Closes the lifecycle loop: routes .brainstorm/<topic>.md to either local
.wiki/concepts/ (room-meta) or global wiki via projects-meta (domain),
extracts action-items into target project's .tasks, archives buffer.
Atomic-ish ordering: ingest -> tasks -> mv. Failure leaves buffer for retry.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
