diff --git a/app/aimodels/bertopic/crud/crud_bertopic_embedding_pretrained.py b/app/aimodels/bertopic/crud/crud_bertopic_embedding_pretrained.py
index b0f2e6b..0536618 100644
--- a/app/aimodels/bertopic/crud/crud_bertopic_embedding_pretrained.py
+++ b/app/aimodels/bertopic/crud/crud_bertopic_embedding_pretrained.py
@@ -2,7 +2,7 @@
 from typing import Union
 from sqlalchemy.orm import Session
 from app.crud.base import CRUDBase
-from app.core.config import get_originated_from, OriginationEnum
+from app.core.config import OriginationEnum
 from ..models.bertopic_embedding_pretrained import BertopicEmbeddingPretrainedModel
 from app.ppg_common.schemas.bertopic.bertopic_embedding_pretrained import BertopicEmbeddingPretrainedCreate, BertopicEmbeddingPretrainedUpdate
 
diff --git a/app/aimodels/bertopic/models/document.py b/app/aimodels/bertopic/models/document.py
index 3366bb9..87fe676 100644
--- a/app/aimodels/bertopic/models/document.py
+++ b/app/aimodels/bertopic/models/document.py
@@ -1,7 +1,6 @@
 from typing import TYPE_CHECKING
 from sqlalchemy import Column, DateTime, UUID, String, Enum
 from sqlalchemy.orm import relationship
-from sqlalchemy.sql import func
 from app.db.base_class import Base
 from app.core.config import get_originated_from, OriginationEnum
 import uuid
diff --git a/app/aimodels/bertopic/models/document_bertopic_trained_model.py b/app/aimodels/bertopic/models/document_bertopic_trained_model.py
index cb09625..8e8dce4 100644
--- a/app/aimodels/bertopic/models/document_bertopic_trained_model.py
+++ b/app/aimodels/bertopic/models/document_bertopic_trained_model.py
@@ -1,5 +1,5 @@
 from typing import TYPE_CHECKING
-from sqlalchemy import Column, ForeignKey, Table, Enum
+from sqlalchemy import Column, ForeignKey, Table
 from app.db.base_class import Base
 
 if TYPE_CHECKING:
diff --git a/app/aimodels/bertopic/models/topic.py b/app/aimodels/bertopic/models/topic.py
index 6cf32d9..202ac04 100644
--- a/app/aimodels/bertopic/models/topic.py
+++ b/app/aimodels/bertopic/models/topic.py
@@ -1,8 +1,5 @@
-from typing import TYPE_CHECKING
 from sqlalchemy import Column, UUID, String, Enum, JSON, Integer, Boolean, ForeignKey
 from sqlalchemy.ext.mutable import MutableDict
-from sqlalchemy.orm import relationship
-from sqlalchemy.sql import func
 from app.db.base_class import Base
 from app.core.config import get_originated_from, OriginationEnum
 import uuid
diff --git a/app/aimodels/bertopic/routers/bertopic_embedding_pretrained.py b/app/aimodels/bertopic/routers/bertopic_embedding_pretrained.py
index 213b2ae..016e717 100644
--- a/app/aimodels/bertopic/routers/bertopic_embedding_pretrained.py
+++ b/app/aimodels/bertopic/routers/bertopic_embedding_pretrained.py
@@ -2,7 +2,7 @@
 import pickle
 import pandas as pd
 from typing import Union
-from io import TextIOWrapper, StringIO, BytesIO, BufferedReader
+from io import StringIO, BytesIO
 
 from fastapi import Depends, APIRouter, UploadFile
 from fastapi import HTTPException
diff --git a/app/aimodels/bertopic/routers/documents.py b/app/aimodels/bertopic/routers/documents.py
index 500699d..8c80480 100644
--- a/app/aimodels/bertopic/routers/documents.py
+++ b/app/aimodels/bertopic/routers/documents.py
@@ -1,7 +1,5 @@
-import os
 from typing import Union
 from fastapi import Depends, APIRouter
-from pydantic import UUID4
 from sqlalchemy.orm import Session
 from app.dependencies import get_db
 from app.core.errors import HTTPValidationError
diff --git a/app/aimodels/bertopic/routers/summarization.py b/app/aimodels/bertopic/routers/summarization.py
index ba46b29..d713d35 100644
--- a/app/aimodels/bertopic/routers/summarization.py
+++ b/app/aimodels/bertopic/routers/summarization.py
@@ -1,8 +1,6 @@
-import json
 from typing import Union, Any
-from pydantic import BaseModel, UUID4
+from pydantic import UUID4
 from fastapi import Depends, APIRouter, HTTPException
-from fastapi.encoders import jsonable_encoder
 from fastapi.responses import HTMLResponse
 from sqlalchemy.orm import Session
 from app.dependencies import get_db
diff --git a/app/aimodels/bertopic/routers/train.py b/app/aimodels/bertopic/routers/train.py
index 46b49da..88c010a 100644
--- a/app/aimodels/bertopic/routers/train.py
+++ b/app/aimodels/bertopic/routers/train.py
@@ -6,7 +6,7 @@
 import pandas as pd
 from app.core.logging import logger
 from app.core.s3 import pickle_and_upload_object_to_s3
-from app.core.errors import ValidationError, HTTPValidationError
+from app.core.errors import HTTPValidationError
 from app.core.config import settings, get_acronym_dictionary, get_icao_dictionary
 from app.dependencies import get_db, get_s3
 from app.ppg_common.schemas.bertopic.document_embedding_computation import DocumentEmbeddingComputationCreate
diff --git a/app/aimodels/gpt4all/crud/crud_llm_pretrained.py b/app/aimodels/gpt4all/crud/crud_llm_pretrained.py
index d62abc1..68a51e9 100644
--- a/app/aimodels/gpt4all/crud/crud_llm_pretrained.py
+++ b/app/aimodels/gpt4all/crud/crud_llm_pretrained.py
@@ -1,8 +1,7 @@
 
 from typing import Union
 from sqlalchemy.orm import Session
-from sqlalchemy import func
-from app.core.config import get_originated_from, OriginationEnum
+from app.core.config import OriginationEnum
 from app.crud.base import CRUDBase
 from app.ppg_common.schemas.gpt4all.llm_pretrained import LlmPretrainedCreate, LlmPretrainedUpdate
 from ..models import LlmPretrainedModel
diff --git a/app/aimodels/gpt4all/models/llm_pretrained.py b/app/aimodels/gpt4all/models/llm_pretrained.py
index 88fe5b0..11c745d 100644
--- a/app/aimodels/gpt4all/models/llm_pretrained.py
+++ b/app/aimodels/gpt4all/models/llm_pretrained.py
@@ -1,7 +1,5 @@
 import uuid
-from typing import TYPE_CHECKING
 from sqlalchemy import Column, Enum, Integer, UUID, String, Boolean, Sequence
-from sqlalchemy.orm import relationship
 from app.db.base_class import Base
 from app.core.config import get_originated_from, OriginationEnum
 from app.ppg_common.schemas.gpt4all.llm_pretrained import LlmFilenameEnum
diff --git a/app/aimodels/gpt4all/routers/pretrained.py b/app/aimodels/gpt4all/routers/pretrained.py
index d848621..0e0de25 100644
--- a/app/aimodels/gpt4all/routers/pretrained.py
+++ b/app/aimodels/gpt4all/routers/pretrained.py
@@ -1,7 +1,6 @@
 
 import hashlib
 from typing import Union
-from aiofiles import open as open_aio
 from fastapi import Depends, APIRouter, UploadFile, HTTPException
 from pydantic import UUID4
 from sqlalchemy.orm import Session
diff --git a/app/chat_search/ai_services/service.py b/app/chat_search/ai_services/service.py
index 1530802..806610d 100644
--- a/app/chat_search/ai_services/service.py
+++ b/app/chat_search/ai_services/service.py
@@ -18,7 +18,6 @@
 from app.chat_search.ai_services.marco_rerank_retriever import MarcoRerankRetriever
 from app.core.errors import ValidationError
 from app.core.s3 import download_pickled_object_from_s3
-from app.core.model_cache import MODEL_CACHE_BASEDIR
 from app.core.config import settings
 from app.aimodels.bertopic.crud import (
     bertopic_embedding_pretrained as bertopic_embedding_pretrained_crud,
diff --git a/app/chat_search/routers/retrieval.py b/app/chat_search/routers/retrieval.py
index bc4247d..b632ce2 100644
--- a/app/chat_search/routers/retrieval.py
+++ b/app/chat_search/routers/retrieval.py
@@ -1,25 +1,17 @@
 import os
-from fastapi import Depends, APIRouter, HTTPException
+from fastapi import Depends, APIRouter
 from fastapi.responses import HTMLResponse
 from jinja2 import Environment, FileSystemLoader
-from pydantic import BaseModel
 from sqlalchemy.orm import Session
 from mypy_boto3_s3.client import S3Client
 
-from app.aimodels.gpt4all.models.llm_pretrained import (
-    LlmFilenameEnum,
-    LlmPretrainedModel,
-)
 from app.aimodels.gpt4all.routers.completions import (
     validate_inputs_and_generate_service,
 )
 from app.dependencies import get_db, get_s3
-from app.core.config import settings
-from ... import crud
 from app.aimodels.gpt4all.ai_services.completion_inference import (
     CompletionInference,
     CompletionInferenceInputs,
-    CompletionInferenceOutputs,
 )
 from ..ai_services.service import RetrievalService
 
diff --git a/app/core/config.py b/app/core/config.py
index 0505415..29e3369 100644
--- a/app/core/config.py
+++ b/app/core/config.py
@@ -1,7 +1,7 @@
 import os
 import enum
 from typing import Optional, Any
-from pydantic import PostgresDsn, validator, field_validator, ValidationInfo
+from pydantic import PostgresDsn, field_validator, ValidationInfo
 from pydantic_settings import BaseSettings
 
 class OriginationEnum(str, enum.Enum):
@@ -16,7 +16,7 @@ class EnvironmentSettings(BaseSettings):
 class Settings(BaseSettings):
     # general settings
     docs_ui_root_path: str = ""
-    log_level: str = "INFO"
+    log_level: str = "WARNING"
     originated_from: OriginationEnum = OriginationEnum.ORIGINATED_FROM_APP
     acronym_dictionary: dict = {}
     icao_dictionary: dict = {}
diff --git a/app/initial_data.py b/app/initial_data.py
index 947daae..1a5d250 100644
--- a/app/initial_data.py
+++ b/app/initial_data.py
@@ -11,7 +11,6 @@
 from tqdm import tqdm
 from typing import Union
 from fastapi import UploadFile
-from fastapi.encoders import jsonable_encoder
 from mypy_boto3_s3.client import S3Client
 
 import app.ppg_common.services.mattermost_utils as mattermost_utils
@@ -21,7 +20,6 @@
 from app.ppg_common.schemas.mattermost.mattermost_documents import ThreadTypeEnum
 
 from app.aimodels.bertopic.models.bertopic_embedding_pretrained import BertopicEmbeddingPretrainedModel, EmbeddingModelTypeEnum
-from app.aimodels.bertopic.models.document import DocumentModel
 from app.aimodels.gpt4all.models.llm_pretrained import LlmPretrainedModel, LlmFilenameEnum
 
 from app.db.init_db import init_db, wipe_db, drop_constraints
diff --git a/app/mattermost/crud/crud_mattermost.py b/app/mattermost/crud/crud_mattermost.py
index 1565a29..7a8ee0d 100644
--- a/app/mattermost/crud/crud_mattermost.py
+++ b/app/mattermost/crud/crud_mattermost.py
@@ -1,7 +1,6 @@
 from typing import Union
 from datetime import datetime, timedelta
 import pandas as pd
-import numpy as np
 from fastapi import HTTPException
 from sqlalchemy.orm import Session
 from app.core.config import settings
diff --git a/app/mattermost/models/mattermost_channels.py b/app/mattermost/models/mattermost_channels.py
index 0db8206..6fcd3a5 100644
--- a/app/mattermost/models/mattermost_channels.py
+++ b/app/mattermost/models/mattermost_channels.py
@@ -6,7 +6,7 @@
 from app.core.config import get_originated_from, OriginationEnum
 
 if TYPE_CHECKING:
-    from .mattermost_documents import MattermostDocumentModel
+    pass
 
 
 class MattermostChannelModel(Base):
diff --git a/app/mattermost/models/mattermost_documents.py b/app/mattermost/models/mattermost_documents.py
index 709b9be..10be7ef 100644
--- a/app/mattermost/models/mattermost_documents.py
+++ b/app/mattermost/models/mattermost_documents.py
@@ -7,9 +7,7 @@
 from app.ppg_common.schemas.mattermost.mattermost_documents import InfoTypeEnum, ThreadTypeEnum
 
 if TYPE_CHECKING:
-    from .mattermost_channels import MattermostChannelModel
-    from .mattermost_users import MattermostUserModel
-    from app.aimodels.bertopic.models.document import DocumentModel
+    pass
 
 
 class MattermostDocumentModel(Base):
diff --git a/app/nitmre_nlp_utils/preprocess.py b/app/nitmre_nlp_utils/preprocess.py
index 5fa78e5..b0866f8 100644
--- a/app/nitmre_nlp_utils/preprocess.py
+++ b/app/nitmre_nlp_utils/preprocess.py
@@ -13,7 +13,7 @@ def _tokenize(msg: str) -> set[str]:
     /   often used between acronyms in an explicit/implied coordination
         line (e.g., DO/LL)
     """
-    p = re.compile('[^\w/#@]+')
+    p = re.compile(r'[^\w/#@]+')
     return set(p.split(msg))  # only keep unique tokens to avoid revisiting during preprocessing
 
 
diff --git a/tests/aimodels/bertopic/routers/test_bertopic_embedding_pretrained.py b/tests/aimodels/bertopic/routers/test_bertopic_embedding_pretrained.py
index 31b10cd..386ae8d 100644
--- a/tests/aimodels/bertopic/routers/test_bertopic_embedding_pretrained.py
+++ b/tests/aimodels/bertopic/routers/test_bertopic_embedding_pretrained.py
@@ -11,8 +11,7 @@
 from fastapi.testclient import TestClient
 from app.core.config import OriginationEnum
 from app.ppg_common.schemas.bertopic.bertopic_embedding_pretrained import BertopicEmbeddingPretrainedCreate
-from app.aimodels.bertopic.models.bertopic_embedding_pretrained import BertopicEmbeddingPretrainedModel
-from app.aimodels.bertopic.crud.crud_bertopic_embedding_pretrained import CRUDBertopicEmbeddingPretrained, bertopic_embedding_pretrained
+from app.aimodels.bertopic.crud.crud_bertopic_embedding_pretrained import bertopic_embedding_pretrained
 from app.aimodels.bertopic.ai_services.weak_learning import WeakLearner
 from fastapi.encoders import jsonable_encoder
 
diff --git a/tests/aimodels/gpt4all/ai_services/conftest.py b/tests/aimodels/gpt4all/ai_services/conftest.py
index 383fb28..aaa9756 100644
--- a/tests/aimodels/gpt4all/ai_services/conftest.py
+++ b/tests/aimodels/gpt4all/ai_services/conftest.py
@@ -1,8 +1,6 @@
 from unittest.mock import create_autospec
 from sqlalchemy.orm import Session
 
-from app.ppg_common.schemas.gpt4all.llm_pretrained import LlmPretrainedCreate
-from app.aimodels.gpt4all import crud
 from app.aimodels.gpt4all.models.llm_pretrained import LlmPretrainedModel
 
 import pytest