GRM-25: feat: auto-delete branch after merge in configure_repo script

src/gitea_runner_manager/api_clients.py

@@ -53,6 +53,13 @@ class GiteaClient:
             raise APIError(status, message) from e
         return response
 
+    # -- repo settings --
+
+    def update_repo_settings(self, settings: dict[str, Any]) -> dict[str, Any]:
+        """Update repository settings (e.g. auto-delete branch after merge)."""
+        r = self._request("PATCH", "", json=settings)
+        return r.json()
+
     # -- branch protection --
 
     def list_branch_protections(self) -> list[dict[str, Any]]: