Use cached settings in database configuration (#74)

Author: shayancoin

backend/api/db.py

@@ -32,6 +32,7 @@ def get_engine_url() -> str:
     # Use the cached settings instance instead of instantiating ``Settings``
     # directly so configuration is read a single time across the app.
     settings = get_settings()
+    # ``get_settings`` returns the cached Settings instance from api.config.
     url = os.getenv("DATABASE_URL", settings.database_url)
     if url.startswith("sqlite"):
         return url