Five endpoints under /integrations/psa/connections:
- GET (any auth user), POST/PUT/DELETE/test (owner+ only)
- Create tests CW connection before saving; update re-tests on cred change
- Credentials decrypted only for masked hints in responses
- Three CI-safe tests: empty GET, engineer 403, delete 404
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
