libtmux(test[logging]): add INFO lifecycle logging schema test

why: No test coverage existed for INFO-level lifecycle log records,
leaving the str-type constraint on extra values unverified.
what:
- Add test_lifecycle_info_logging_schema that creates a window
  and asserts INFO records have str-typed extra values
- Verify tmux_subcommand, tmux_session, tmux_window, tmux_target
  are all str when present

Author: tony

tests/test_logging.py

@@ -9,6 +9,7 @@
 
 if t.TYPE_CHECKING:
     from libtmux.server import Server
+    from libtmux.session import Session
 
 
 def test_tmux_cmd_debug_logging_schema(
@@ -20,6 +21,33 @@ def test_tmux_cmd_debug_logging_schema(
         server.cmd("list-sessions")
     records = [r for r in caplog.records if hasattr(r, "tmux_cmd")]
     assert len(records) >= 1
-    record = records[0]
-    assert isinstance(getattr(record, "tmux_cmd"), str)
-    assert isinstance(getattr(record, "tmux_exit_code"), int)
+    record = t.cast(t.Any, records[0])
+    assert isinstance(record.tmux_cmd, str)
+    assert isinstance(record.tmux_exit_code, int)
+
+
+def test_lifecycle_info_logging_schema(
+    session: Session,
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Test that lifecycle operations produce INFO records with str-typed extra."""
+    with caplog.at_level(logging.INFO, logger="libtmux.session"):
+        window = session.new_window(window_name="log_test")
+
+    records = [
+        r
+        for r in caplog.records
+        if hasattr(r, "tmux_subcommand") and r.levelno == logging.INFO
+    ]
+    assert len(records) >= 1, "expected at least one INFO lifecycle record"
+
+    for record in records:
+        rec = t.cast(t.Any, record)
+        for key in ("tmux_subcommand", "tmux_session", "tmux_window", "tmux_target"):
+            val = getattr(rec, key, None)
+            if val is not None:
+                assert isinstance(val, str), (
+                    f"extra key {key!r} should be str, got {type(val).__name__}"
+                )
+
+    window.kill()