feat(scouts): add GmailConnector list_labels + stop_watch

app/scouts/connectors/gmail.py

@@ -211,3 +211,29 @@ class GmailConnector:
     async def renew_watch(self, scout) -> None:
         """Renew an existing Gmail Pub/Sub watch (same as setup_watch)."""
         await self.setup_watch(scout)
+
+    async def list_labels(self, scout) -> list[dict]:
+        """Return the account's Gmail labels as [{id, name}]. Empty if no token."""
+        if not scout.oauth_token_encrypted:
+            return []
+
+        def _sync() -> list[dict]:
+            service = _get_gmail_service(scout)
+            resp = service.users().labels().list(userId="me").execute()
+            return [{"id": lbl["id"], "name": lbl["name"]} for lbl in resp.get("labels", [])]
+
+        return await asyncio.to_thread(_sync)
+
+    async def stop_watch(self, scout) -> None:
+        """Stop Gmail push notifications. Swallows errors (watch may be gone)."""
+        if not scout.oauth_token_encrypted:
+            return
+
+        def _sync() -> None:
+            service = _get_gmail_service(scout)
+            service.users().stop(userId="me").execute()
+
+        try:
+            await asyncio.to_thread(_sync)
+        except Exception:
+            logger.exception("stop_watch failed for scout %s", scout.id)