Connection & Channel workers never quit

[adizere]

Crate

relayer

Summary

A connection (informalsystems/ibc-rs#1019) or channel worker starts up when a chain emits a specific events of type handshake (e.g., conn open init, or chan open init). If Hermes is running passively (hermes start) with strategy = all and one of these workers start, then the worker takes care of triggering any further steps needed to complete the open handshake protocols. After complete the handshake, however, the worker never quits, it just sits in an infinite loop. It's not clear if the worker will ever have any other tasks to complete, but at a minimum there should be a mechanism to allow the worker to detect when its job is done & exit gracefully.

Acceptance Criteria

• the supervisor as well as the workers for connection & channel handle gracefully the end-of-life of these workers

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