Offload functions to worker threads with shared memory primitives for Node.js.

fix(test): eliminate race in shutdown tests master

The previous 50ms setTimeout was unreliable — the worker may not have booted and started consuming fds yet. Now: - in-flight test: waits for HTTP response headers (worker is mid-flight) - drainTimeout test: waits for TCP connect + 100ms grace for fd transit Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>


+55 -10
2 changed files