remember() now writes the brain_memories row with indexed_at=null and
dispatches EmbedMemory::dispatch($memory->id) for async Qdrant + ES
indexing, instead of calling qdrantUpsert() synchronously. Response shape
matches the row state — caller gets the memory immediately, the Job
flips indexed_at once the Qdrant write succeeds.
Superseded rows still soft-delete synchronously (part of the remember
contract, not the indexing path).
php/tests/Feature/Services/BrainServiceRememberTest.php uses Queue::fake()
to assert EmbedMemory is dispatched and BrainService::qdrantUpsert() is
NOT called directly (subclass probe).
Co-authored-by: Codex <noreply@openai.com>
Closes tasks.lthn.sh/view.php?id=55
