Feat: 가이드라인 삭제 기능 추가

src/main/java/com/example/sinitto/guardGuideline/controller/GuardGuidelineController.java

@@ -56,4 +56,12 @@ public ResponseEntity<GuardGuidelineResponse> getGuardGuideline(@RequestParam("c
         return ResponseEntity.ok(guardGuidelineService.readGuardGuideline(callbackId, guidelineId));
     }
 
+    @Operation(summary = "특정 가이드라인 삭제", description = "보호자용 API입니다.")
+    @DeleteMapping("/delete")
+    public ResponseEntity<String> deleteGuardGuideline(@MemberId Long memberId, @RequestParam("guidelineId") Long guidelineId) {
+        guardGuidelineService.deleteGuardGuideline(memberId, guidelineId);
+        return ResponseEntity.ok("가이드라인이 삭제되었습니다.");
+    }
+
+
 }

src/main/java/com/example/sinitto/guardGuideline/dto/GuardGuidelineResponse.java

@@ -3,7 +3,7 @@
 import com.example.sinitto.guardGuideline.entity.GuardGuideline;
 
 public record GuardGuidelineResponse(
-        Long Id,
+        Long id,
         GuardGuideline.Type type,
         String title,
         String content) {

src/main/java/com/example/sinitto/guardGuideline/service/GuardGuidelineService.java

@@ -68,6 +68,17 @@ public void updateGuardGuideline(Long memberId, Long guidelineId, GuardGuideline
         guardGuideline.updateGuardGuideline(guardGuidelineRequest.type(), guardGuidelineRequest.title(), guardGuidelineRequest.content());
     }
 
+    @Transactional
+    public void deleteGuardGuideline(Long memberId, Long guidelineId) {
+        GuardGuideline guardGuideline = guardGuidelineRepository.findById(guidelineId).orElseThrow(
+                () -> new NotFoundException("해당 가이드라인이 존재하지 않습니다.")
+        );
+        if (guardGuideline.getSenior().isNotGuard(memberId)) {
+            throw new BadRequestException("해당 Guard의 Senior가 아닙니다.");
+        }
+        guardGuidelineRepository.delete(guardGuideline);
+    }
+
     @Transactional(readOnly = true)
     public List<GuardGuidelineResponse> readAllGuardGuidelinesBySenior(Long memberId, Long seniorId) {
         Senior senior = seniorRepository.findById(seniorId).orElseThrow(