Fix/Add CHECK_FOR_INTERRUPTS to health check worker to prevent DROP …

[akankshahu]

…DATABASE hangs (#1063)

[Copilot]

Pull request overview

This pull request fixes issue #1063 where DROP DATABASE operations would hang when health check workers were running. The fix adds proper interrupt handling to allow health check workers to respond promptly to termination signals.

Changes:

• Added CHECK_FOR_INTERRUPTS() calls in health check worker loops to enable proper signal handling
• Added explicit got_sigterm checks after connection establishment and latch wakeup for faster shutdown
• Added comprehensive test suite to verify DROP DATABASE operations complete without hanging

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/monitor/health_check_worker.c	Added interrupt checking in HealthCheckWorkerMain and DoHealthChecks loops, plus explicit SIGTERM checks after connection and latch wait for fast exit
tests/test_drop_database.py	New comprehensive test suite covering basic DROP, DROP WITH FORCE, multiple sequential drops, and worker cleanup verification

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