fix: add process-level uncaughtException and unhandledRejection handlers

[0x-SquidSol]

Summary

• The application had SIGTERM/SIGINT handlers but no handlers for uncaughtException or unhandledRejection, causing silent crashes without logging or cleanup
• Fix: Both handlers now log the error and call the existing shutdown() function, which handles Sentry flush, WebSocket cleanup, HTTP server close, and has a 10s force-exit timeout

Files Changed

• src/index.ts — Added 2 process event handlers (8 lines)

Test plan

• All 189 existing tests pass
• TypeScript compiles clean (tsc --noEmit)
• Verified no infinite loop risk (shutdown has try/catch + force-exit timeout)
• Verified no duplicate handler conflicts with existing SIGTERM/SIGINT

🤖 Generated with Claude Code

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: c25806af-47e6-4e89-bfb1-88d617d95739

📥 Commits

Reviewing files that changed from the base of the PR and between e9c72c9 and 3d70267.

📒 Files selected for processing (1)

• src/index.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[dcccrypto]

Sentinel security review — MERGE

Without uncaughtException / unhandledRejection handlers, any unhandled async throw would kill the process silently — no Sentry flush, no WebSocket teardown, no HTTP server close. Both handlers now route through the existing shutdown() function which has a 10-second force-exit timeout preventing infinite loops. Change is 8 lines in src/index.ts with no new logic surface.

No blocking findings. Security APPROVED.