perf(worker): 提交后发送准入唤醒通知

将准入登记、派发、释放、恢复和验收清理中的 PostgreSQL NOTIFY 从同步复制业务事务移到提交后的独立异步提交事务，避免数据库对象锁串行阻塞跨城事务。通知继续作为有轮询兜底的限时提示，不改变任务状态、租约和账务的同步提交语义。

验证：Go 全量测试、go vet、迁移安全检查、gofmt、diff check 通过；新增集成回归确认 NOTIFY 对象锁存在时准入状态仍先提交可见。

apps/api/internal/store/acceptance.go

@@ -376,7 +376,8 @@ FOR UPDATE`, SystemSettingGatewayTrafficMode).Scan(&value); err != nil {
 		current.WorkerImageDigest != strings.TrimSpace(input.WorkerImageDigest) {
 		return GatewayTrafficMode{}, ErrAcceptanceStateConflict
 	}
-	if _, err := cancelSafeAcceptanceTasksTx(ctx, tx, current.RunID); err != nil {
+	cancelled, err := cancelSafeAcceptanceTasksTx(ctx, tx, current.RunID)
+	if err != nil {
 		return GatewayTrafficMode{}, err
 	}
 	next := GatewayTrafficMode{Mode: "live", Revision: current.Revision + 1}
@@ -396,6 +397,9 @@ WHERE id = $1::uuid AND status IN ('running', 'failed', 'passed')`, current.RunI
 	if err := tx.Commit(ctx); err != nil {
 		return GatewayTrafficMode{}, err
 	}
+	if cancelled > 0 {
+		s.notifyTaskAdmissionBestEffort(ctx, "*")
+	}
 	next.UpdatedAt = time.Now()
 	return next, nil
 }
@@ -555,11 +559,6 @@ WHERE admission.task_id = task.id
   )`, runID); err != nil {
 		return 0, err
 	}
-	if tag.RowsAffected() > 0 {
-		if err := notifyTaskAdmissionTx(ctx, tx, "*"); err != nil {
-			return 0, err
-		}
-	}
 	return tag.RowsAffected(), nil
 }