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_bootstrap.py

@@ -35,12 +35,12 @@ def _config(tmp: str) -> Config:
     )
 
 
-def _record(**kw) -> RunRecord:
-    defaults: dict[str, object] = dict(
-        owner="o", repo="r", issue_number=1, slug="s1", agent_name="a",
-        bottle_names=["claude"], backend_name="docker", agent_git_user="bot",
-        pr_number=5, status="running", last_checkin_at="2026-01-01T00:00:00+00:00",
-    )
+def _record(**kw: object) -> RunRecord:
+    defaults: dict[str, object] = {
+        "owner": "o", "repo": "r", "issue_number": 1, "slug": "s1", "agent_name": "a",
+        "bottle_names": ["claude"], "backend_name": "docker", "agent_git_user": "bot",
+        "pr_number": 5, "status": "running", "last_checkin_at": "2026-01-01T00:00:00+00:00",
+    }
     defaults.update(kw)
     return RunRecord(**defaults)  # type: ignore[arg-type]
 
@@ -169,10 +169,10 @@ class BuildTest(unittest.TestCase):
             config = _config(tmp)
             with patch.dict(os.environ, {"GITEA_TOKEN": "tok"}):
                 server, _, _ = build(config)
-            host, port = server.server_address
+            addr = server.server_address
             server.server_close()
-        self.assertEqual("127.0.0.1", host)
-        self.assertGreater(port, 0)
+        self.assertEqual("127.0.0.1", addr[0])
+        self.assertGreater(addr[1], 0)
 
 
 if __name__ == "__main__":