Update middleware code in main.py

src/main.py

@@ -31,7 +31,7 @@ from src.rate_limiter import limiter
 from src.api import api_router
 from src.database.core import engine, async_session, collector_async_session
 from src.exceptions import handle_exception
-
+from src.middleware import RequestValidationMiddleware
 
 log = logging.getLogger(__name__)
 
@@ -58,6 +58,8 @@ _request_id_ctx_var: ContextVar[Optional[str]] = ContextVar(
 def get_request_id() -> Optional[str]:
     return _request_id_ctx_var.get()
 
+app.add_middleware(RequestValidationMiddleware)
+
 
 @app.middleware("http")
 async def db_session_middleware(request: Request, call_next):