feat: 新增统一命名功能，自动替换prompt内唯一标识符，优化prompt效果

src/heart_flow/observation.py

@@ -58,7 +58,8 @@ class ChattingObservation(Observation):
                             for msg in mid_memory_by_id["messages"]:
                                 msg_str += f"{msg['detailed_plain_text']}"
                             time_diff = int((datetime.now().timestamp() - mid_memory_by_id["created_at"]) / 60)
-                            mid_memory_str += f"距离现在{time_diff}分钟前：\n{msg_str}\n"
+                            # mid_memory_str += f"距离现在{time_diff}分钟前：\n{msg_str}\n"
+                            mid_memory_str += f"{msg_str}\n"
                 except Exception as e:
                     logger.error(f"获取mid_memory_id失败: {e}")
                     traceback.print_exc()