Why the Outbox Pattern, Queue, and Embedding Worker?

The previous post covered why I chose pgvector for semantic search. But there was another question: When should a memory be embedded? At first, it might seem simple: Create memory ▼ Generate embedding ▼ Save embedding But this makes memory creation dependent on the embedding process. If the embedding provider is slow or unavailable, creating a memory could also fail or become slow. I wanted to separate these two operations.