feat: add tool execution timeout guard

[Ashok161]

Summary

• add a configurable timeout guard around tool execution in core
• plumb oolTimeoutMs through server config into provider chat params
• add focused timeout tests in core and handler coverage in server

Verification

• corepack pnpm --filter @chatcops/core test -- tests/providers/tool-execution.test.ts
• corepack pnpm --filter @chatcops/server test -- tests/handler.test.ts

Closes #37

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Project	Deployment	Actions	Updated (UTC)
chatcops-website	Ready	Preview, Comment	Mar 25, 2026 1:56am

[anurag629]

Clean and focused. Timeout with Promise.race, timer cleanup in finally, fake timer tests hitting the exact boundary. Looks good @Ashok161.