merge: testing → main (reconcile 2-week divergence)

decnet/web/db/models/common.py

@@ -0,0 +1,15 @@
+"""Generic response shapes used across multiple router domains."""
+from __future__ import annotations
+
+from pydantic import BaseModel
+
+
+class MessageResponse(BaseModel):
+    """Standard envelope for mutations whose only payload is a status message.
+
+    Pinning the wire shape at the decorator (``response_model=MessageResponse``)
+    prevents a handler that accidentally returns a richer dict — e.g. a user
+    row with ``password_hash`` — from leaking extra fields to the client.
+    """
+
+    message: str