Add validateGitRef() helper function that uses an allowlist approach to prevent
OS command injection through git commit SHAs, branch names, and tags. Only allows
alphanumeric characters, dots, hyphens, underscores, and slashes.
Changes include:
- Add validateGitRef() helper in bootstrap/helpers/shared.php
- Apply validation in Rollback component when accepting rollback commit
- Add regex validation to git commit SHA fields in Livewire components
- Apply regex validation to API rules for git_commit_sha
- Use escapeshellarg() in git log and git checkout commands
- Add comprehensive unit tests covering injection payloads
Addresses GHSA-mw5w-2vvh-mgf4
- Add automatic trimming in Application model's boot method for git_repository, git_branch, and git_commit_sha fields
- Add real-time trimming in Source Livewire component via updated{Property} methods
- Refresh component state after save to ensure UI displays trimmed values
- Prevents deployment issues caused by accidental whitespace in git configuration
