Orphaned `trigger-dev-run-worker` processes were pinning CPU at 100%
after the dev CLI exited — stuck in an uncaughtException feedback loop
where a closed IPC channel kept throwing `ERR_IPC_CHANNEL_CLOSED` back
into a handler that itself called `process.send`.
Fix:
- `ZodIpcConnection` no-ops sends when the channel is disconnected.
- Dev workers exit on `process.disconnect` instead of being re-parented
to init.
- All worker `uncaughtException` handlers route through a `safeSend`
guard so the handler can never re-enter itself.
Verified end-to-end: `kill -9` of the dev CLI now cleans up all child
workers within ~2s.
Eric Allam
b65a04eb37