- adds up to: https://github.com/supabase/cli/pull/5862
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added an “Error docs” link in Edge Function testing UI when an
`sb-error-code` header is present.
* **Bug Fixes**
* Improved the Edge Function test proxy to consistently preserve
upstream status, headers (including repeated headers), and response
bodies without transformation.
* Enhanced handling for invalid function URLs and upstream fetch
failures.
* **Tests**
* Added unit, API, and Playwright E2E coverage for error docs linking
and response proxy behavior.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
