fix(lark): link feedback cards to persisted messages

[glow-Kev1n]

Summary

• return the persisted final assistant message ID from the Lark response collector
• embed that ID in new Feishu feedback card actions and forward it through chat.recordFeedback
• keep legacy cards without message_id compatible
• omit feedback buttons when the final assistant message could not be persisted, while still delivering the answer

Root cause

Feishu feedback cards previously carried only the session and CardKit card ID. That was sufficient to identify the card, but not to unambiguously correlate an older card with its persisted assistant turn.

message_ref remains the card aggregation and re-vote idempotency key. The new message_id is used only for the exact chat-message link.

The field is optional on callbacks and RPC requests so cards created by older Runtime versions remain compatible.

Validation

• npx vitest run src/gateway/channels/lark-card.test.ts src/gateway/channels/lark.test.ts — 144 tests passed
• npm run build — passed

Both checks ran on the development host with Node.js 22.22.3.