feat: add unified linting scripts and git hooks for code quality enforcement

- Introduced `lint` and `lint-fix` applications in `flake.nix` for unified linting of backend (Python) and frontend (TypeScript/Svelte) code.
- Added `scripts/lint.sh` for manual linting execution.
- Created `scripts/install-hooks.sh` to set up git hooks for automatic linting before commits and optional tests before pushes.
- Updated `README.md` with instructions for using the new linting features and git hooks.

backend/app/core/logging.py

@@ -8,27 +8,24 @@ from app.core.config import settings
 
 def setup_logging() -> None:
     """Configure application logging."""
-    
+
     # Get log level from settings
     log_level = getattr(logging, settings.LOG_LEVEL.upper(), logging.INFO)
-    
+
     # Configure root logger
     logging.basicConfig(
         level=log_level,
         format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
         datefmt="%Y-%m-%d %H:%M:%S",
-        handlers=[
-            logging.StreamHandler(sys.stdout)
-        ],
+        handlers=[logging.StreamHandler(sys.stdout)],
     )
-    
+
     # Set library log levels
     logging.getLogger("uvicorn").setLevel(logging.INFO)
     logging.getLogger("uvicorn.access").setLevel(logging.INFO)
     logging.getLogger("sqlalchemy.engine").setLevel(logging.WARNING)
     logging.getLogger("boto3").setLevel(logging.WARNING)
     logging.getLogger("botocore").setLevel(logging.WARNING)
-    
+
     logger = logging.getLogger(__name__)
     logger.info(f"Logging configured with level: {settings.LOG_LEVEL}")
-