* fix: sync message_count to state.db for /insights (#163)
sync_session_usage() didn't write message_count to state.db, so
/insights showed 0 messages for all WebUI sessions even with
sync_to_insights enabled.
Added message_count parameter to sync_session_usage() and pass
len(s.messages) from both the streaming and non-streaming chat paths.
Fixes#163
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix: use callable pattern for _execute_write in sync_session_usage
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Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>