feat: initialize aivideo project

backend/app/common/middleware/request_id.py

@@ -0,0 +1,14 @@
+from uuid import uuid4
+
+from starlette.middleware.base import BaseHTTPMiddleware
+from starlette.requests import Request
+
+
+class RequestIdMiddleware(BaseHTTPMiddleware):
+    async def dispatch(self, request: Request, call_next):
+        request_id = request.headers.get("X-Request-Id", f"req_{uuid4().hex[:16]}")
+        request.state.request_id = request_id
+        response = await call_next(request)
+        response.headers["X-Request-Id"] = request_id
+        return response
+