feat(feishu): add Feishu channel integration — long-connection bot + OAuth binding
- FeishuRouterService: WSClient long-connection, code binding, OAuth, async bridge, UX (thinking timer, queue feedback, error messages)
- AgentChannelController: add feishu/bind, status, unbind, oauth/init, oauth/callback, bridge-callback endpoints
- AgentModule: register FeishuRouterService
- kong.yml: add feishu-oauth-public route (no JWT, must be before agent-service)
- docker-compose: add IT0_FEISHU_APP_ID / IT0_FEISHU_APP_SECRET env vars
- DB migration 012: feishu_user_id column + index on agent_instances
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
hailin
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