perf(methods): 通过移除不必要的 self 参数优化方法签名

在包括 chat、plugin_system、schedule 和 mais4u 在内的多个模块中，消除冗余的实例引用。此次改动将无需访问实例状态的实用函数转换为静态方法，从而提升了内存效率，并使方法依赖关系更加清晰。

src/chat/memory_system/Hippocampus.py

@@ -926,7 +926,7 @@ class EntorhinalCortex:
             timestamp_start = target_timestamp
             timestamp_end = target_timestamp + time_window_seconds
 
-            if chosen_message := get_raw_msg_by_timestamp(
+            if chosen_message := await get_raw_msg_by_timestamp(
                 timestamp_start=timestamp_start,
                 timestamp_end=timestamp_end,
                 limit=1,
@@ -934,7 +934,7 @@ class EntorhinalCortex:
             ):
                 chat_id: str = chosen_message[0].get("chat_id")  # type: ignore
 
-                if messages := get_raw_msg_by_timestamp_with_chat(
+                if messages := await get_raw_msg_by_timestamp_with_chat(
                     timestamp_start=timestamp_start,
                     timestamp_end=timestamp_end,
                     limit=chat_size,

src/chat/memory_system/async_memory_optimizer.py

@@ -137,7 +137,8 @@ class AsyncMemoryQueue:
                 except Exception:
                     pass
 
-    async def _handle_store_task(self, task: MemoryTask) -> Any:
+    @staticmethod
+    async def _handle_store_task(task: MemoryTask) -> Any:
         """处理记忆存储任务"""
         # 这里需要根据具体的记忆系统来实现
         # 为了避免循环导入，这里使用延迟导入
@@ -156,7 +157,8 @@ class AsyncMemoryQueue:
             logger.error(f"记忆存储失败: {e}")
             return False
 
-    async def _handle_retrieve_task(self, task: MemoryTask) -> Any:
+    @staticmethod
+    async def _handle_retrieve_task(task: MemoryTask) -> Any:
         """处理记忆检索任务"""
         try:
             # 获取包装器实例
@@ -173,7 +175,8 @@ class AsyncMemoryQueue:
             logger.error(f"记忆检索失败: {e}")
             return []
 
-    async def _handle_build_task(self, task: MemoryTask) -> Any:
+    @staticmethod
+    async def _handle_build_task(task: MemoryTask) -> Any:
         """处理记忆构建任务（海马体系统）"""
         try:
             # 延迟导入避免循环依赖

src/chat/memory_system/instant_memory.py

@@ -106,7 +106,8 @@ class InstantMemory:
         else:
             logger.info(f"不需要记忆：{text}")
 
-    async def store_memory(self, memory_item: MemoryItem):
+    @staticmethod
+    async def store_memory(memory_item: MemoryItem):
         with get_db_session() as session:
             memory = Memory(
                 memory_id=memory_item.memory_id,
@@ -198,7 +199,8 @@ class InstantMemory:
             logger.error(f"获取记忆出现错误：{str(e)} {traceback.format_exc()}")
             return None
 
-    def _parse_time_range(self, time_str):
+    @staticmethod
+    def _parse_time_range(time_str):
         # sourcery skip: extract-duplicate-method, use-contextlib-suppress
         """
         支持解析如下格式：

src/chat/memory_system/vector_instant_memory.py

@@ -243,7 +243,8 @@ class VectorInstantMemoryV2:
             logger.error(f"查找相似消息失败: {e}")
             return []
 
-    def _format_time_ago(self, timestamp: float) -> str:
+    @staticmethod
+    def _format_time_ago(timestamp: float) -> str:
         """格式化时间差显示"""
         if timestamp <= 0:
             return "未知时间"