自动编排接口现在立即返回 202 + jobId，不会再等待 15 秒导致 Axios 超时。

任务参数、状态和结果持久化到 MySQL。
接入现有 outbox；配置 BackgroundJobs__Transport=RabbitMq 时使用 RabbitMQ 队列 exam.arrangement，否则使用 InMemory worker。
服务重启后可恢复未完成任务。
前端显示排队/执行/完成/失败状态，刷新页面可恢复正在执行的任务。
编排期间禁止修改、删除或发布对应计划。
补考原有“一键生成”保留，并与编排任务互斥。
运维后台增加“考试与补考编排”失败任务筛选。

src/Jiaowu.Api/Controllers/OperationsController.cs

@@ -213,6 +213,34 @@ public sealed class OperationsController(
                 .ToListAsync(cancellationToken));
         }
 
+        if (normalizedKind is null or "ExamArrangement")
+        {
+            var query = db.ExamArrangementJobs.AsNoTracking()
+                .Where(x =>
+                    x.Status == ExamArrangementJobStatus.Failed &&
+                    x.CreatedAt >= effectiveFrom);
+            if (to.HasValue) query = query.Where(x => x.CreatedAt <= to.Value);
+            total += await query.CountAsync(cancellationToken);
+            rows.AddRange(await query
+                .OrderByDescending(x => x.CompletedAt ?? x.UpdatedAt)
+                .Take(take)
+                .Select(x => new FailedBackgroundJobItem(
+                    x.Id,
+                    "ExamArrangement",
+                    x.Kind == ExamArrangementKind.FormalExam
+                        ? "正式考试编排"
+                        : "补考编排",
+                    x.Kind == ExamArrangementKind.FormalExam
+                        ? "正式考试计划"
+                        : "补考计划",
+                    x.ErrorMessage ?? "任务失败但未记录错误详情。",
+                    x.CreatedAt,
+                    x.StartedAt,
+                    x.CompletedAt,
+                    0))
+                .ToListAsync(cancellationToken));
+        }
+
         var pageItems = rows
             .OrderByDescending(x => x.CompletedAt ?? x.CreatedAt)
             .Skip((page - 1) * pageSize)
@@ -435,6 +463,11 @@ public sealed class OperationsController(
             .CountAsync(
                 x => x.Status == MakeupExamAutoJobStatus.Failed &&
                      x.CreatedAt >= from,
+                cancellationToken) +
+        await db.ExamArrangementJobs.AsNoTracking()
+            .CountAsync(
+                x => x.Status == ExamArrangementJobStatus.Failed &&
+                     x.CreatedAt >= from,
                 cancellationToken);
 
     private ActionResult? ValidatePaging(int page, int pageSize)
@@ -462,6 +495,7 @@ public sealed class OperationsController(
             "AutomaticSchedule" => "AutomaticSchedule",
             "SchedulePublish" => "SchedulePublish",
             "MakeupExamAuto" => "MakeupExamAuto",
+            "ExamArrangement" => "ExamArrangement",
             _ => null
         };
     }