Add generic memory gateway v1

memory_gateway/server_auth.py

@@ -0,0 +1,15 @@
+"""Small auth bridge used by the modular v1 router."""
+from __future__ import annotations
+
+from typing import Optional
+
+from fastapi import Header, HTTPException, status
+
+from .config import get_config
+
+
+def verify_api_key_compat(x_api_key: Optional[str] = Header(default=None)) -> None:
+    expected_key = get_config().server.api_key
+    if expected_key and x_api_key != expected_key:
+        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid or missing API key")
+