The contributor's regression test for Feishu fallback thread routing
asserted on attributes specific to the real lark SDK builder
(call_args.body, body.receive_id). In test environments without the
lark SDK installed, the in-tree fallback (gateway/platforms/feishu.py
_build_create_message_request) returns a SimpleNamespace using
.request_body instead of .body, causing AttributeError.
Now reads via getattr fallback and also verifies receive_id_type is
'thread_id' (not 'chat_id') as a stronger contract check.
When the first streamed message exceeds the platform length limit and
gets split into chunks, _send_new_chunk was called with self._message_id
(which is None on first send), dropping thread routing entirely.
Fallback to self._initial_reply_to_id so overflow chunks land in the
correct topic/thread.
Also fix a fragile test assertion that could be silently skipped.
Cherry-picked from PR #13077 commits:
- 5500c7d8 fix(gateway): stream consumer first message drops thread context
- e84403b9 test(gateway): add regression tests for stream consumer thread routing
Fixes: Streaming first message drops thread/topic context in Feishu group
topics, Slack threads, Telegram forum topics. Adds initial_reply_to_id
ctor arg to GatewayStreamConsumer, threaded through _send_or_edit and
_send_new_chunk. Also fixes Feishu _send_raw_message fallback path
(reply -> create) to use receive_id_type='thread_id' so the new message
lands in the correct topic instead of the main channel.
Authored by hrygo via PR #13077 (re-attributed from the bot-authored
salvage commit on the original branch).
