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/db/migrations/003-pending-approvals.ts

@@ -29,7 +29,9 @@ export const migration003: Migration = {
         platform_id         TEXT,
         platform_message_id TEXT,
         expires_at          TEXT,
-        status              TEXT NOT NULL DEFAULT 'pending'
+        status              TEXT NOT NULL DEFAULT 'pending',
+        title               TEXT NOT NULL DEFAULT '',
+        options_json        TEXT NOT NULL DEFAULT '[]'
       );
 
       CREATE INDEX idx_pending_approvals_action_status