refactor: strengthen architecture CI gates and runtime contracts

app/chain/message.py

@@ -7,22 +7,16 @@ from concurrent.futures import CancelledError as FutureCancelledError
 from dataclasses import dataclass
 from datetime import datetime
 from pathlib import Path
-from typing import Any, Optional, Dict, Union, List, Tuple
+from typing import Any, Dict, List, Optional, Tuple, Union
 from urllib.parse import unquote, urlparse
 
+from app.adapters.network.http import RequestUtils
 from app.application.agent import (
     get_running_agent_manager,
     is_audio_input_available,
     supports_image_input,
     transcribe_audio,
 )
-from app.chain import ChainBase
-from app.chain.site import SiteChain
-from app.chain.subscribe import SubscribeChain
-from app.chain.transfer import TransferChain
-from app.chain.interaction import MediaInteractionChain as _MediaInteractionChain
-from app.runtime.config import global_vars
-from app.runtime.tasks import get_task_registry
 from app.application.messaging.agent import agent_interaction_manager, parse_agent_choice_callback
 from app.application.messaging.interaction import InteractionContext, InteractionDispatch
 from app.application.messaging.media import media_interaction_manager
@@ -32,12 +26,17 @@ from app.application.messaging.session import MessageSessionService
 from app.application.messaging.site import site_interaction_manager
 from app.application.messaging.skill import SkillInteractionHandler, skill_interaction_manager
 from app.application.messaging.subscribe import subscribe_interaction_manager
+from app.chain import ChainBase
+from app.chain.interaction import MediaInteractionChain as _MediaInteractionChain
+from app.chain.site import SiteChain
+from app.chain.subscribe import SubscribeChain
+from app.chain.transfer import TransferChain
+from app.runtime.config import global_vars
 from app.runtime.log import logger
-from app.schemas.message import IncomingMessage
-from app.schemas.message import Message
+from app.runtime.tasks import get_task_registry
+from app.schemas.message import IncomingMessage, Message
 from app.schemas.notification import ChannelCapabilityManager
 from app.schemas.types import EventType, NotificationChannel
-from app.adapters.network.http import RequestUtils
 
 
 class MessageChain(ChainBase):