发布课表时，在同一事务内生成实际周次课次明细。

已审批的调课、停课、补课、代课后，会重建受影响教学任务所在已发布课表的明细投影。

src/Jiaowu.Api/Infrastructure/Timetables/PublishedTimetableProjectionService.cs

@@ -6,6 +6,17 @@ namespace Jiaowu.Api.Infrastructure.Timetables;
 
 public sealed class PublishedTimetableProjectionService(AppDbContext db)
 {
+    public async Task RebuildPublishedPlansForTaskAsync(Guid teachingTaskId, CancellationToken cancellationToken)
+    {
+        var plans = await db.SchedulePlans
+            .Where(plan => plan.Status == SchedulePlanStatus.Published &&
+                plan.Entries.Any(entry => entry.TeachingTaskId == teachingTaskId))
+            .Include(plan => plan.Entries)
+            .ToListAsync(cancellationToken);
+        foreach (var plan in plans)
+            await RebuildAsync(plan, cancellationToken);
+    }
+
     public async Task RebuildAsync(SchedulePlan plan, CancellationToken cancellationToken)
     {
         var previous = db.PublishedScheduleOccurrences.Where(x => x.SchedulePlanId == plan.Id);