refactor(schemas): 统一 message/notification 命名边界，旧名收敛至兼容映射表

- notification 域：渠道能力（MessageChannel→NotificationChannel、ChannelCapability* 迁入 notification.py）
- message 域：消息收发（Notification→Message、NotificationType→MessageType、CommingMessage→IncomingMessage、NotificationHistoryItem→MessageHistoryItem、NotificationClear*→MessageClear*）
- Agent 工具契约：send_notification_message→send_message、notification_callback→message_callback
- 源码不保留旧名物理别名，旧导入经 app/runtime/compat/manifest.py SYMBOL_ALIASES 惰性解析
- API 路径与持久化键冻结不变，前端零改动
- 新增兼容守护测试与 docs/rules/07 命名边界规范

tests/test_telegram.py

@@ -13,8 +13,8 @@ from app.domain.context import MediaInfo, Context, TorrentInfo
 from app.domain.metainfo import MetaInfo
 from app.modules.telegram import TelegramModule
 from app.modules.telegram.telegram import Telegram
-from app.schemas import Notification
-from app.schemas.types import MessageChannel
+from app.schemas import Message
+from app.schemas.types import NotificationChannel
 from app.schemas.types import MediaType
 
 
@@ -346,8 +346,8 @@ def test_telegram_module_passes_parse_mode_to_client():
         module, "get_instance", return_value=client
     ):
         module.post_message(
-            Notification(
-                channel=MessageChannel.Telegram,
+            Message(
+                channel=NotificationChannel.Telegram,
                 source="telegram-test",
                 title="HTML",
                 text="<b>正文</b>",
@@ -374,8 +374,8 @@ def test_telegram_module_plain_post_message_keeps_chat_without_editing_source_me
         module, "get_instance", return_value=client
     ):
         module.post_message(
-            Notification(
-                channel=MessageChannel.Telegram,
+            Message(
+                channel=NotificationChannel.Telegram,
                 source="telegram-test",
                 title="Agent 回复",
                 text="处理完成",
@@ -406,8 +406,8 @@ def test_telegram_module_passes_force_reply_to_client():
         module, "get_instance", return_value=client
     ):
         module.post_message(
-            Notification(
-                channel=MessageChannel.Telegram,
+            Message(
+                channel=NotificationChannel.Telegram,
                 source="telegram-test",
                 title="请输入目录",
                 text="回复目录路径",
@@ -441,8 +441,8 @@ def test_telegram_module_force_reply_sends_new_prompt_message():
         module, "get_instance", return_value=client
     ):
         module.post_message(
-            Notification(
-                channel=MessageChannel.Telegram,
+            Message(
+                channel=NotificationChannel.Telegram,
                 source="telegram-test",
                 title="请输入目录",
                 text="回复目录路径",
@@ -480,8 +480,8 @@ def test_telegram_module_direct_force_reply_sends_new_prompt_message():
         module, "get_instance", return_value=client
     ):
         response = module.send_direct_message(
-            Notification(
-                channel=MessageChannel.Telegram,
+            Message(
+                channel=NotificationChannel.Telegram,
                 source="telegram-test",
                 title="请输入目录",
                 text="回复目录路径",
@@ -521,8 +521,8 @@ def test_telegram_module_direct_buttons_keep_new_message_behavior():
         module, "get_instance", return_value=client
     ):
         response = module.send_direct_message(
-            Notification(
-                channel=MessageChannel.Telegram,
+            Message(
+                channel=NotificationChannel.Telegram,
                 source="telegram-test",
                 title="请选择",
                 text="请选择一个操作",
@@ -560,8 +560,8 @@ def test_telegram_module_plain_direct_message_keeps_userid_target():
         module, "get_instance", return_value=client
     ):
         response = module.send_direct_message(
-            Notification(
-                channel=MessageChannel.Telegram,
+            Message(
+                channel=NotificationChannel.Telegram,
                 source="telegram-test",
                 userid="10001",
                 title="普通通知",