Lier les services l'un à l'autre

...gestionstagesbackend/controllers/CandidacyController.java

...estionstagesbackend/controllers/EnterpriseController.java

...ple/gestionstagesbackend/controllers/StageController.java

...e/gestionstagesbackend/controllers/StudentController.java

...onstagesbackend/controllers/UnivSupervisorController.java

...ava/com/example/gestionstagesbackend/model/Candidacy.java

...va/com/example/gestionstagesbackend/model/Enterprise.java

...in/java/com/example/gestionstagesbackend/model/Stage.java

.../java/com/example/gestionstagesbackend/model/Student.java

...om/example/gestionstagesbackend/model/UnivSupervisor.java

...estionstagesbackend/repositories/CandidacyRepository.java

...le/gestionstagesbackend/repositories/StageRepository.java

...ample/gestionstagesbackend/services/CandidacyService.java

...mple/gestionstagesbackend/services/EnterpriseService.java

...m/example/gestionstagesbackend/services/StageService.java

...example/gestionstagesbackend/services/StudentService.java

.../gestionstagesbackend/services/UnivSupervisorService.java