fix(gateway): only a real is_bot=True source is a bot peer; approval timeout reads the ctx source safely

Mock sources in the notice and approval suites carry a MagicMock is_bot; SessionSource.is_bot is a bool.

gateway/bot_peer_notices.py

@@ -12,6 +12,6 @@ from typing import Any
 
 
 def automatic_notices_allowed(source: Any) -> bool:
-    """False when the message came from a known bot (``source.is_bot``: platform bot flag or the
-    adapter's ``bot_users`` opt-in)."""
-    return not bool(getattr(source, "is_bot", False))
+    """False when the message came from a known bot (``SessionSource.is_bot``, a bool: the platform's
+    bot flag or the adapter's ``bot_users`` opt-in). Anything but a real ``True`` is not a known bot."""
+    return getattr(source, "is_bot", False) is not True

gateway/run_turn_runner_approval_settle.py

@@ -67,7 +67,7 @@ async def _post_timeout_notice(
     from gateway.bot_peer_notices import automatic_notices_allowed
 
     adapter = ctx._status_adapter
-    if not automatic_notices_allowed(ctx.source):
+    if not automatic_notices_allowed(getattr(ctx, "source", None)):
         return
     notice = format_approval_timed_out_notice(timeout_s)
     metadata = _interim_metadata(ctx._status_thread_metadata)