worker restarts

[nitsujlangston]

• ✅ Unlimited restarts - Workers will continuously restart on crash
• ✅ Abnormal exit only - Only restarts on crashes (code !== 0 or signal)
• ✅ 5-second delay - Fixed 5-second delay before each restart (hardcoded
  )
• ✅ No backoff - Consistent 5-second delay, no exponential backoff
• ✅ Shutdown protection - Workers will NOT restart during service
  shutdown

[Copilot]

Pull request overview

This PR implements worker process restart functionality with automatic recovery from crashes. Workers now restart after a 5-second delay when they exit abnormally, while graceful shutdowns and service stops are respected.

Key changes:

• Workers now automatically restart after crashes with a fixed 5-second delay
• Added tracking of worker IDs and restart counts across restarts
• Shutdown protection prevents restarts during service termination

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
packages/bitcore-node/src/services/worker.ts	Implemented worker restart logic with exit handlers, restart scheduling, and shutdown protection
packages/bitcore-node/test/unit/services/worker.spec.ts	Added comprehensive test suite covering restart scenarios, timing, edge cases, and error conditions

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