Operators want to know what address to poke when triaging a swarm decky;
the compose-hash column was debug scaffolding that never paid off.
DeckyShard has no IP column (the deploy-time IP lives on DecnetConfig),
so the list endpoint resolves it at read time by joining shards against
the stored deployment state by decky_name. Missing lookups render as "—"
rather than erroring — the list stays useful even after a master restart
that hasn't persisted a config yet.
anti
e8e11b2896