**Purpose:** Durable task factory built on Temporal. Manages ActivityDefinitions, schedules recurring workflows via Temporal Schedules, routes events via NATS JetStream, and exposes a FastAPI CRUD surface for the custodian domain.

**Domain:** custodian
**Repo slug:** activity-core
**Topic ID:** cee7bedf-2b48-46ef-8601-006474f2ad7a