[Chore][jjaeroong]: 스웨거 PLANNING에서 PLAN으로 변경

Author: jjaeroong

src/main/java/stackpot/stackpot/pot/controller/PotController.java

@@ -38,7 +38,7 @@ public class PotController {
         - potStatus: RECRUITING / ONGOING / COMPLETED
         - potStartDate, potEndDate: yyyy.MM 형식 (예: 2025.08)
         - potModeOfOperation: ONLINE / OFFLINE / HYBRID
-        - Role: FRONTEND / BACKEND / DESIGN / PLANNING
+        - Role: FRONTEND / BACKEND / DESIGN / PLAN
     """)
     @PostMapping
     public ResponseEntity<ApiResponse<PotResponseDto>> createPot(@RequestBody @Valid PotRequestDto requestDto) {

src/main/java/stackpot/stackpot/pot/dto/PotRecruitmentRequestDto.java

@@ -1,5 +1,6 @@
 package stackpot.stackpot.pot.dto;
 
+import io.swagger.v3.oas.annotations.media.Schema;
 import lombok.Builder;
 import lombok.Getter;
 import lombok.Setter;
@@ -10,6 +11,8 @@
 @Builder
 public class PotRecruitmentRequestDto {
     @ValidRole
+    @Schema(description = "모집 역할", example = "BACKEND")
     private String recruitmentRole;
+    @Schema(description = "역할 별 모집 인원 수", example = "1")
     private Integer recruitmentCount;
 }

src/main/java/stackpot/stackpot/pot/service/potMember/PotMemberCommandServiceImpl.java

@@ -78,8 +78,10 @@ public List<PotMemberAppealResponseDto> addMembersToPot(Long potId, PotMemberReq
         }
 
         // 생성자 PotMember는 이미 createPot 단계에서 저장됨 → 새로 만들지 말고 조회
-        PotMember creatorPM = potMemberRepository
-                .findByPotIdAndUserId(potId, potCreator.getId());
+        PotMember creatorPM = potMemberRepository.findByPotIdAndUserId(potId, potCreator.getId());
+        if (creatorPM == null) {
+            throw new PotHandler(ErrorStatus.POT_MEMBER_NOT_FOUND);
+        }
 
         // 승인된 멤버들만 저장
         List<PotMember> savedMembers = potMemberRepository.saveAll(newMembers);
@@ -113,7 +115,7 @@ public void updateAppealContent(Long potId, String appealContent) {
     }
 
     @Override
-    @org.springframework.transaction.annotation.Transactional
+    @Transactional
     public void removeMemberFromPot(Long potId) {
         User user = authService.getCurrentUser();
         Pot pot = potRepository.findById(potId)