fix: resolve code quality and type safety issues in management API

- Fix syntax error in test_management.py (unterminated string literal)
- Remove unused imports and fix line length violations for flake8 compliance
- Add missing type annotations and fix mypy type errors
- Add to_dict() method to ReplicatedDatabase class
- Add from_dict() and metric_name property to WorkspaceGroupMetrics class
- Fix import issues and attribute access patterns in workspace.py
- Ensure all pre-commit hooks pass (flake8, mypy, autopep8)

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: kesmit13

singlestoredb/management/audit_logs.py

@@ -82,7 +82,7 @@ def from_dict(
             owner_id=obj['ownerId'],
             resource_id=obj['resourceId'],
             resource_name=obj['resourceName'],
-            resource_type=obj['resource_type'],
+            resource_type=obj['resourceType'],
             value=obj['value'],
         )
         out._manager = manager
@@ -142,7 +142,7 @@ def from_dict(
         out = cls(
             description=obj['description'],
             metric=str(camel_to_snake(obj['metric'])),
-            usage=[UsageItem.from_dict(x, manager) for x in obj['Usage']],
+            usage=[UsageItem.from_dict(x, manager) for x in obj['usage']],
         )
         out._manager = manager
         return out