fix: resolve pylint/pyright issues in new test files

- test_contrib_gitea_client: remove unused Any import, fix _mock_response
  to use return_value instead of lambda (unknown lambda type), narrow
  HTTPError hdrs type, add type annotations to fake_urlopen helpers,
  suppress protected-access for _request tests
- test_bootstrap: annotate **kw as **kw: object, use dict literal,
  unpack server_address via index to avoid tuple type mismatch
- test_main: remove unused MagicMock import
- test_watchdog: guard store.get() result before accessing .status

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/unit/orchestrator/test_main.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 
 import io
 import unittest
-from unittest.mock import MagicMock, patch
+from unittest.mock import patch
 
 from bot_bottle.orchestrator.__main__ import main
 from bot_bottle.orchestrator.config import Config