Create a /request-anonymization/{request UUID} Post API for anonymizing one a single closed request

Requirements/Scope:

Verify that the user has the UI-Requests Request-Anonymize Single Execute capability

Anonymizes request as described in https://folio-org.atlassian.net/browse/CIRC-2292

Returns an error message if anonymization fails

Acceptance Criteria:

Post API for single request anonymization by UUID is created

- Add permissionsRequired and modulePermissions for /request-anonymization/{requestId} handler in ModuleDescriptor-template.json
- Use UuidUtil.isUuid in RequestAnonymizationService and return failed validation when requestId is invalid
- Simplify fetchRequest to delegate to requestRepository.getById without extra failWhen logic
- Change scrubPii to return Request instead of Result and call it via mapResult
- Simplify publishLog to return Result<Void> from eventPublisher without remapping
- Fix Result chain to use flatMapResult for validateStatus and after(...) for async update/log
- Remove unused validationError helper that relied on old ValidationError constructor
- Update RequestAnonymizationServiceTest to inject mocks via constructor (remove reflection)
- Adjust not-found test to return failed RecordNotFoundFailure instead of succeeded(null)
- Reorder imports in tests to follow mod-circulation import order convention

remove a unused line

Fix displayName/description wording: "anonymize request" instead of "anonymize requests".

Update permission name to modperms.circulation.requests.anonymize.single.

Remove redundant modulePermission already included in anonymize.single.

Inline RequestRepository.using(...) initializer into single line.

Condense ValidationErrorFailure.failedValidation(...) into one line.

Add UUID format validation to requestId in anonymize-single-request-response.json.

Remove extra spacing alignment in EventPublisher .put() calls.

Replace wildcard imports in RequestAnonymizationServiceTest with explicit imports.

Reorder imports to follow mod-circulation import convention.

Adjust permission naming to follow FOLIO scope convention (item vs collection).