feat: add parallel caching for individual stock analysis using asyncio.gather

backend/app/main.py

@@ -87,7 +87,7 @@ async def batch_analysis_scheduler():
     """
     await asyncio.sleep(15)  # 부팅 안정화 (auto_trade_scheduler보다 늦게 시작)
     from app.api.endpoints.recommendations import get_rule_based_recommendations_realtime
-    from app.core.redis import setex_json, TTL_RECOMMENDATIONS
+    from app.core.redis import setex_json, TTL_RECOMMENDATIONS, TTL_ANALYSIS
 
     interval = int(getattr(settings, "BATCH_ANALYSIS_INTERVAL", 600))  # 기본 10분
     logger.info(f"📊 Batch analysis scheduler started (every {interval}s)")
@@ -115,6 +115,20 @@ async def batch_analysis_scheduler():
                             f"(rule 수: {len(normalized.get('recommendations_by_rule', {}))}, "
                             f"TTL: {TTL_RECOMMENDATIONS}s)"
                         )
+                        
+                    # ===== 개별 종목별 캐시 (병렬 처리 적용) =====
+                    raw_list = result.get("recommendations", [])
+                    cache_tasks = []
+                    
+                    for item in raw_list:
+                        code = item.get("stock_code") or item.get("code")
+                        if code:
+                            cache_tasks.append(setex_json(f"analysis:{code}", TTL_ANALYSIS, item))
+                            
+                    if cache_tasks:
+                        await asyncio.gather(*cache_tasks, return_exceptions=True)
+                        logger.info(f"💾 [Batch] 개별 종목 분석 데이터 캐시 갱신 완료: {len(cache_tasks)}건 (TTL: {TTL_ANALYSIS}s)")
+                    # ===============================================
                 # ───────────────────────────────────────────────────────
 
             except Exception as e:
@@ -524,7 +538,7 @@ async def health_check():
 
 @app.websocket("/ws/{client_id}")
 async def websocket_endpoint(websocket: WebSocket, client_id: str):
-    """WebSocket 연결 엔드포인트.
+    \"\"\"WebSocket 연결 엔드포인트.
 
     클라이언트→서버 지원 프로토콜:
       {"type": "ping"}                                       → {"type": "pong"}
@@ -534,7 +548,7 @@ async def websocket_endpoint(websocket: WebSocket, client_id: str):
       {"type": "get_chart", "stock_code": "...", "period": "D", "limit": 200}
                                                             → {"type": "chart_data", ...}
       그 외 메시지                                           → echo
-    """
+    \"\"\"
     await websocket_manager.connect(websocket, client_id)
     try:
         while True: