refactor: consolidate get_db into single module

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

tests/conftest.py

@@ -63,9 +63,8 @@ def db_session():
 def client(db_session) -> TestClient:
     """Create a test client with a fresh database."""
     
-    # Import all the different get_db functions used across the app
-    from app.api.common import get_db as api_get_db
-    from app.views.base import get_db as views_get_db
+    # Import the canonical get_db function
+    from app.database import get_db
     
     # Override the get_db dependency to use our test database
     def override_get_db():
@@ -74,10 +73,8 @@ def client(db_session) -> TestClient:
         finally:
             pass
     
-    # Override all variants of get_db
+    # Override the single canonical get_db dependency
     fastapi_app.dependency_overrides[get_db] = override_get_db
-    fastapi_app.dependency_overrides[api_get_db] = override_get_db
-    fastapi_app.dependency_overrides[views_get_db] = override_get_db
     
     # Use base_url to satisfy TrustedHostMiddleware
     with TestClient(fastapi_app, base_url="http://localhost") as test_client: