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

tests/unit/test_api_clients.py

@@ -189,6 +189,20 @@ class TestGiteaClient:
             json={"Do": "squash", "MergeTitleField": "fix: bug"},
         )
 
+    def test_update_repo_settings(self) -> None:
+        client = GiteaClient("https://git.example.com", "tok", "owner", "repo")
+        client._session.request = MagicMock(return_value=_mock_response({"default_delete_branch_after_merge": True}))
+
+        settings = {"default_delete_branch_after_merge": True}
+        result = client.update_repo_settings(settings)
+        assert result["default_delete_branch_after_merge"] is True
+        client._session.request.assert_called_once_with(
+            "PATCH",
+            "https://git.example.com/repos/owner/repo",
+            timeout=DEFAULT_TIMEOUT,
+            json=settings,
+        )
+
     def test_create_release(self) -> None:
         client = GiteaClient("https://git.example.com", "tok", "owner", "repo")
         client._session.request = MagicMock(return_value=_mock_response({"id": 1}))