- Use the reset_qdrant_singleton fixture in the network-mode test instead
of manual save/restore boilerplate.
- Add a test locking down the sync-callable forwarding branch (callable
returning a non-coroutine is passed through without thread offload).
- Document that _drive_local_coroutine treats a bare `yield None` as a
non-suspension, and that the proxy is wrapped before the startup
migrations so the O(N) backfill scroll also runs off the event loop.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
