feat(ci): add migration rollback and remove duplicate chown in Jenkinsfile

- Save pre-deploy SHA before git pull for automatic rollback
- On migrate failure: git reset + migrate:rollback + reinstall deps + restart
- Remove duplicate chown from Restart Services stage (already in Fix Permissions)
- Clean up .deploy_prev_sha after deploy completes

composer.json

@@ -43,7 +43,6 @@
     "require-dev": {
         "fakerphp/faker": "^1.9.1",
         "laravel/breeze": "^1.25",
-        "laravel/pint": "^1.0",
         "laravel/sail": "^1.18",
         "mockery/mockery": "^1.4.4",
         "nunomaduro/collision": "^7.0",