Spring Service Scaffold

Generate a $ARGUMENTSService with:

• @Service annotation
• Constructor injection of $ARGUMENTSRepository (no field @Autowired)
• CRUD methods: findAll(), findById(id), create(request), update(id, request), delete(id)
• Domain exceptions (e.g., EntityNotFoundException) thrown for missing-by-id; let @ControllerAdvice translate to HTTP if present
• SLF4J logging at meaningful boundaries — entry on writes, warn on validation rejection, debug on reads
• Unit tests using JUnit 5 + Mockito, with @MockitoBean and @MockitoSpyBean where appropriate
• Use modern Java idioms (records for DTOs, pattern matching, var where readable)

Constraints

• Match the existing project package layout
• Don't introduce Lombok if the project doesn't already use it
• If the project uses MapStruct, generate a mapper interface; otherwise, write the mapping inline
• Tests should cover happy path, not-found, and at least one validation/edge case per write method