harden deploy reports and admin alerts

app/services/admin_notifications.py

@@ -132,6 +132,22 @@ async def send_admin_telegram_notification(notification: AdminNotification) -> N
         notification.telegram_status = "sent"
 
 
+async def retry_admin_telegram_notifications(session: AsyncSession, *, limit: int = 50) -> int:
+    result = await session.execute(
+        select(AdminNotification)
+        .where(AdminNotification.telegram_status.in_(["pending", "failed"]))
+        .order_by(AdminNotification.created_at.asc())
+        .limit(limit)
+    )
+    delivered = 0
+    for notification in result.scalars():
+        await send_admin_telegram_notification(notification)
+        if notification.telegram_status == "sent":
+            delivered += 1
+    await session.commit()
+    return delivered
+
+
 async def mark_admin_notification_read(
     session: AsyncSession, notification: AdminNotification
 ) -> AdminNotification: