fix(adr075): webhooks send_approval_card 補傳 alert_category+notification_type

斷點真正根因：_push_to_telegram_background 呼叫 send_approval_card()
時沒有傳入 alert_category 和 notification_type，導致動態按鈕永遠
fallback 到通用 [批准][拒絕][靜默]。

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/api/src/api/v1/webhooks.py

@@ -395,6 +395,9 @@ async def _push_to_telegram_background(
             ai_cost=ai_cost,
             ai_provider=ai_provider,
             incident_id=incident_id,
+            # ADR-075 斷點 B 修復: 傳入分類以啟用動態按鈕
+            alert_category=alert_category,
+            notification_type=notification_type,
         )
 
         logger.info(