只处理今天的帖子，避免重复

task/hot_topic/real_estate_story.py

@@ -9,9 +9,9 @@ from llm import LLMThinkingEngine
 
 def story_edit_task():
     with SessionLocal() as db:
-        # 获取昨天至今的最新10条帖子信息
+        # 获取今天最新的帖子（限定，最多10条）
         today_contents = db.query(SourceContent).filter(
-            SourceContent.create_time >= (datetime.today().replace(hour=0, minute=0, second=0, microsecond=0) - timedelta(days=1))
+            SourceContent.create_time >= (datetime.today().replace(hour=0, minute=0, second=0, microsecond=0))
         ).order_by(SourceContent.create_time.desc()).limit(10).all()
         if len(today_contents) == 0:
             logger.info("story_edit_task finish, content size 0")