fix: authentication issues for certificate endpoints and improve test coverage

- Updated UsersPage tests to check for specific URL formats instead of regex patterns.
- Increased timeout for Go coverage report generation to handle larger repositories.
- Cleaned up generated artifacts before running CodeQL analysis to reduce false positives.
- Removed outdated QA testing report for authentication fixes on the certificates page.
- Added final report confirming successful resolution of authentication issues with certificate endpoints.
- Deleted previous test output files to maintain a clean test results directory.

.github/instructions/copilot-instructions.md

@@ -67,7 +67,7 @@ Before proposing ANY code change or fix, you must build a mental map of the feat
 
 ## Documentation
 
-- **Features**: Update `docs/features.md` when adding capabilities.
+- **Features**: Update `docs/features.md` when adding capabilities. This is a short "marketing" style list. Keep details to their individual docs.
 - **Links**: Use GitHub Pages URLs (`https://wikid82.github.io/charon/`) for docs and GitHub blob links for repo files.
 
 ## CI/CD & Commit Conventions