Dependencies

• communication-service for guest invite email.
• social-service for profiles, groups, and friendships.
• auth-service for registered user lookup.
• feed-service for post interaction and bulk evidence.
• media-service for guest media ingest.

Timeouts and circuit breakers belong on the client adapter, not in the use case. A failed downstream call for a non-critical side effect should become an outbox or inbox retry, not a user-facing 500, when the business write has already committed.