fix(tests): make unmatched-id log test work on pytest < 9

The pyflowlauncher logger disables propagation (records go to
plugin.log), and caplog before pytest 9 only captures propagated
records, so the assertion failed on CI's 3.8/3.9 jobs. Re-enable
propagation for the test via monkeypatch.

Claude-Session: https://claude.ai/code/session_0187j4hp3ndjDPLJy9kdHXnr

Author: Garulf

tests/unit/test_jsonrpc.py

@@ -147,8 +147,11 @@ async def _run():
     asyncio.run(_run())
 
 
-def test_v2_unmatched_response_id_logs_warning(caplog):
+def test_v2_unmatched_response_id_logs_warning(caplog, monkeypatch):
     """Responses with an unknown id must be logged, not silently dropped."""
+    # base.py disables propagation on the package logger (records go to
+    # plugin.log); pytest < 9 caplog only sees propagated records.
+    monkeypatch.setattr(logging.getLogger('pyflowlauncher'), 'propagate', True)
     with caplog.at_level(logging.WARNING, logger='pyflowlauncher.jsonrpc'):
         msgs = _collect_messages('{"id": 7, "result": {}}\n')
     assert msgs == []