fix: ignore JSON-RPC notifications

[BelfordZ]

Summary

• stop router handler from replying to JSON-RPC notifications
• filter notifications from HTTP/HTTPS/WebSocket/IPC responses
• add tests for notification handling

Testing

• npm test
• npm run lint

---

https://chatgpt.com/codex/tasks/task_e_68b362c26dc0832fad10379451e75d66

[codecov]

Codecov Report

❌ Patch coverage is 69.23077% with 16 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.11%. Comparing base (eee4a4d) to head (1197bbe).

Files with missing lines	Patch %	Lines
src/transports/http.ts	57.14%	6 Missing ⚠️
src/transports/https.ts	57.14%	6 Missing ⚠️
src/transports/ipc.ts	77.77%	2 Missing ⚠️
src/transports/websocket.ts	77.77%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #868      +/-   ##
==========================================
- Coverage   98.96%   94.11%   -4.85%     
==========================================
  Files           9        9              
  Lines         289      323      +34     
  Branches       43       49       +6     
==========================================
+ Hits          286      304      +18     
- Misses          3       19      +16     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.