* Create WEB-COOKIE-GUIDE.md for Web Cookie providers
Added a comprehensive guide for using Web Cookie providers with OmniRoute, including setup instructions, credential formats, limitations, and troubleshooting tips.
* Fix formatting in WEB-COOKIE-GUIDE.md
* Add Web Cookie Providers section to providers guide
Added section for Web Cookie Providers with a reference to the WEB-COOKIE-GUIDE.md.
* Enhance CLAUDE_WEB.md with user guidance
Added introductory information and guidance for new users of the Claude Web provider.
v3.8.40 cycle integration → main. All test gates green (Unit/Integration/Coverage/Node-compat/Quality-Ratchet). The only red check, 'PR Test Policy', is the test-masking heuristic firing on the cumulative ~57-commit release diff (legitimate assert consolidations already reviewed per-PR — Gemini CLI removal #5246, retired GPT models #5280, provider catalog refreshes); overridden with --admin per the documented release-PR convention. CodeQL/SonarQube advisory scans non-blocking; #5278's code already passed CodeQL on main. Homologated on VPS 192.168.0.15 (v3.8.40 healthy).
