Make mypy happy

Author: pamelafox

src/backend/fastapi_app/rag_advanced.py

@@ -1,5 +1,5 @@
 from collections.abc import AsyncGenerator
-from typing import Any
+from typing import Any, Final
 
 from openai import AsyncAzureOpenAI, AsyncOpenAI, AsyncStream
 from openai.types.chat import ChatCompletion, ChatCompletionChunk, ChatCompletionMessageParam
@@ -40,7 +40,7 @@ async def generate_search_query(
         """Generate an optimized keyword search query based on the chat history and the last question"""
 
         tools = build_search_function()
-        tool_choice = "auto"
+        tool_choice: Final = "auto"
 
         query_messages: list[ChatCompletionMessageParam] = build_messages(
             model=self.chat_model,

src/backend/pyproject.toml

@@ -13,7 +13,7 @@ dependencies = [
     "pgvector>=0.2.5,<0.3.0",
     "openai>=1.34.0,<2.0.0",
     "tiktoken>=0.7.0,<0.8.0",
-    "openai-messages-token-helper>=0.1.7,<0.2.0",
+    "openai-messages-token-helper>=0.1.8,<0.2.0",
     "azure-monitor-opentelemetry>=1.6.0,<2.0.0",
     "opentelemetry-instrumentation-sqlalchemy>=0.46b0,<1.0.0",
     "opentelemetry-instrumentation-aiohttp-client>=0.46b0,<1.0.0",