feat: add endpoint to retrieve paid application count by school

Author: polyglot-k

src/main/java/life/mosu/mosuserver/global/filter/Whitelist.java

@@ -50,8 +50,8 @@ public enum Whitelist {
     //USER find-password
     USER_FIND_PASSWORD("/api/v1/user/me/find-password", WhitelistMethod.POST),
 
-    APPLICATION_GUEST("/api/v1/applications/guest", WhitelistMethod.ALL);
-
+    APPLICATION_GUEST("/api/v1/applications/guest", WhitelistMethod.ALL),
+    APPLICATION_PAID("/api/v1/applications/schools/paid-count",WhitelistMethod.ALL);
     private static final List<ExceptionRule> AUTH_REQUIRED_EXCEPTIONS = List.of(
             new ExceptionRule("/api/v1/exam-application", WhitelistMethod.GET)
     );

src/main/java/life/mosu/mosuserver/presentation/application/ApplicationController.java

@@ -10,6 +10,7 @@
 import life.mosu.mosuserver.presentation.application.dto.ApplicationRequest;
 import life.mosu.mosuserver.presentation.application.dto.ApplicationResponse;
 import life.mosu.mosuserver.presentation.application.dto.CreateApplicationResponse;
+import life.mosu.mosuserver.presentation.application.dto.SchoolApplicationCountResponse;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.http.HttpStatus;
@@ -74,4 +75,12 @@ public ResponseEntity<ApiResponseWrapper<List<ApplicationResponse>>> getApplicat
         return ResponseEntity.ok(
                 ApiResponseWrapper.success(HttpStatus.OK, "신청 내역 조회 성공", responses));
     }
+
+    //학교별 결제된 신청 수 조회
+    @GetMapping("/schools/paid-count")
+    public ResponseEntity<ApiResponseWrapper<List<SchoolApplicationCountResponse>>> getPaidApplicationCountBySchool() {
+        List<SchoolApplicationCountResponse> responses = applicationService.getPaidApplicationCountBySchool();
+        return ResponseEntity.ok(
+                ApiResponseWrapper.success(HttpStatus.OK, "학교별 결제된 신청 수 조회 성공", responses));
+    }
 }