Wraps plugin.actions.listActions() in a try/catch so a single
broken channel plugin cannot crash the entire agent boot sequence.
Errors are logged once per plugin+message (deduped) via
defaultRuntime.error() and the call gracefully returns an empty
array instead of propagating the exception.
Fixes: 'Cannot read properties of undefined (reading listActions)'
after the clawdbot→moltbot rename left some plugin state undefined.
