Search Memories Vector

Search developer-readable default memory memory through hydrated vector candidates.

This narrow developer API vector endpoint fails closed unless the authenticated Developer API app/key has a verified memories.read scope, a persisted app/key default-read grant, and the server-owned rollout state enables developer_api memory default-memory reads. Vector hits are hydrated from authoritative users/{uid}/memory_items before returning results, so stale Short-term and Archive remain unavailable by default.