feat: add idempotent batch task submission and recovery examples

internal/storage/mysql/worker_execution.go

@@ -49,6 +49,11 @@ func lockQueue(ctx context.Context, tx *sql.Tx, ns, id core.ID) (paused bool, ma
 	if _, err = lockApplicationResources(ctx, tx, ns, false); err != nil {
 		return
 	}
+	return lockQueueAfterApplication(ctx, tx, ns, id)
+}
+
+// lockQueueAfterApplication 仅在同一事务已持有应用额度排他锁时调用。
+func lockQueueAfterApplication(ctx context.Context, tx *sql.Tx, ns, id core.ID) (paused bool, max uint32, err error) {
 	err = tx.QueryRowContext(ctx, "SELECT paused,max_concurrency FROM pulse_queues WHERE namespace_id=? AND id=? FOR UPDATE", ns, id).Scan(&paused, &max)
 	if errors.Is(err, sql.ErrNoRows) {
 		err = fault.NotFound