add outer/inner sequence

design/backend/sequence/inner/event-추천결과조회.puml

@@ -0,0 +1,45 @@
+@startuml event-추천결과조회
+!theme mono
+
+title Event Service - AI 추천 결과 폴링 조회
+
+participant "EventController" as Controller <<C>>
+participant "JobService" as JobSvc <<S>>
+participant "Redis Cache" as Cache <<E>>
+
+note over Controller: GET /api/jobs/{jobId}/status
+Controller -> JobSvc: getJobStatus(jobId)
+activate JobSvc
+
+JobSvc -> Cache: get("job:" + jobId)
+activate Cache
+
+alt 캐시 히트
+    Cache --> JobSvc: Job data\n{status, result, createdAt}
+
+    alt Job 완료 (status: COMPLETED)
+        JobSvc --> Controller: JobStatusResponse\n{jobId, status: COMPLETED,\nrecommendations: [...]}
+        Controller --> Client: 200 OK\n{status: COMPLETED,\nrecommendations: [\n  {title, prize, method, cost, roi},\n  {title, prize, method, cost, roi},\n  {title, prize, method, cost, roi}\n]}
+
+    else Job 진행중 (status: PROCESSING)
+        JobSvc --> Controller: JobStatusResponse\n{jobId, status: PROCESSING}
+        Controller --> Client: 200 OK\n{status: PROCESSING}
+        note right: 클라이언트는 2초 후\n재요청
+
+    else Job 실패 (status: FAILED)
+        JobSvc --> Controller: JobStatusResponse\n{jobId, status: FAILED, error}
+        Controller --> Client: 200 OK\n{status: FAILED, error}
+    end
+
+else 캐시 미스
+    Cache --> JobSvc: null
+    JobSvc --> Controller: NotFoundError
+    Controller --> Client: 404 Not Found\n{error: "Job not found"}
+end
+
+deactivate Cache
+deactivate JobSvc
+
+note over Controller, Cache: 최대 30초 동안 폴링\n(2초 간격, 최대 15회)\n\n타임아웃 시 클라이언트는\n에러 메시지 표시
+
+@enduml