POST /api/osi/ai-context/reconcile

Force a reconcile of the library entity index against the application database, blocking until a reconcile covering this call finishes. Returns the index mutations (index) separately from execution timing (execution: how long the run waited to start, then how long it ran). This call never reuses a reconcile already in progress (it may have started before your latest change); it starts one if the index is idle, otherwise it queues a single follow-up that any other waiting calls share. Requires the library entity-retrieval feature; returns a 400 when the index is unavailable (the feature isn't licensed, or the pgvector store or embedding backend isn't configured).