The periodic sync walked the vault, read files and ran synchronous database
deletes on the event loop, freezing active chat streams while it ran. Those
blocking steps now run in threads. Deletes use JSONB containment, which the
cmetadata GIN index (jsonb_path_ops) supports, and are batched into one
transaction per pass. Deleted files leave the index cache only after their
chunks are deleted, so a failed delete is retried on the next sync.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Ryan Chen