feat : 바우처 생성 dto 데이터 검증 기능 추가

Author: ASak1104

src/main/java/team/marco/voucher_management_system/web_app/controller/VoucherController.java

@@ -1,5 +1,6 @@
 package team.marco.voucher_management_system.web_app.controller;
 
+import jakarta.validation.Valid;
 import java.time.LocalDateTime;
 import java.util.List;
 import java.util.Optional;
@@ -38,7 +39,7 @@ public List<Voucher> findAll() {
     }
 
     @PostMapping
-    public ResponseEntity<Voucher> create(CreateVoucherRequest createVoucherRequest) {
+    public ResponseEntity<Voucher> create(@Valid CreateVoucherRequest createVoucherRequest) {
         Voucher voucher = voucherService.create(createVoucherRequest);
 
         return ResponseEntity.ok(voucher);

src/main/java/team/marco/voucher_management_system/web_app/dto/CreateVoucherRequest.java

@@ -1,8 +1,12 @@
 package team.marco.voucher_management_system.web_app.dto;
 
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Positive;
 import team.marco.voucher_management_system.type_enum.VoucherType;
 
 public record CreateVoucherRequest(
+        @NotNull
         VoucherType type,
+        @Positive
         int data) {
 }