- Add integration test for per-destination thread_id resolution: seeds two
destinations with different thread IDs, verifies each outbound message
carries the correct thread_id (not a global one from the batch routing).
- Add log line in resolveDestinationThread catch block for debuggability.
- Remove stray "(ensurePreCompactHook is defined after the main function.)"
comment from group-init.ts.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>