Unify webhook handling across channel adapters and add the WeChat Official Account channel so inbound routing and replies work without platform-specific handlers. Add adapter-scoped proxy support and stable config field ordering so restricted network environments can deliver WeChat and Telegram messages reliably.
Prepend replied-to message text and attachments into the user query so
the LLM can see what is being replied to, matching the existing Telegram
behavior. Also set is_reply_to_bot metadata for Feishu reply-to-bot
detection in group chats.