fix(v2/approvals): render correct title + selected label after click

Approval cards bypass the deliverMessage path that populates
pending_questions, so the post-click lookup found nothing and the
card edit fell back to "❓ Question" + the raw option value
("approve"/"reject"). Store title and normalized options on
pending_approvals as well, and look up either table via a shared
getAskQuestionRender helper so the chat-sdk post-click edit and the
Discord interaction callback render the per-card title and the
selectedLabel (e.g. "✅ Approved").

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/types.ts

@@ -106,6 +106,8 @@ export interface PendingApproval {
   platform_message_id: string | null;
   expires_at: string | null;
   status: 'pending' | 'approved' | 'rejected' | 'expired';
+  title: string;
+  options_json: string;
 }
 
 // ── Pending credentials (central DB) ──