feat(worker): MCP tools update_planning_task and finalize

src/ClaudeDo.Data/Repositories/TaskRepository.cs

@@ -267,6 +267,23 @@ public sealed class TaskRepository
         return child;
     }
 
+    public async Task UpdatePlanningTaskAsync(
+        string taskId,
+        string? title,
+        string? description,
+        CancellationToken ct = default)
+    {
+        var entity = await _context.Tasks.AsNoTracking().FirstOrDefaultAsync(t => t.Id == taskId, ct)
+            ?? throw new InvalidOperationException("Planning task not found.");
+        if (title is not null) entity.Title = title;
+        if (description is not null) entity.Description = description;
+        await _context.Tasks
+            .Where(t => t.Id == taskId)
+            .ExecuteUpdateAsync(s => s
+                .SetProperty(t => t.Title, entity.Title)
+                .SetProperty(t => t.Description, entity.Description), ct);
+    }
+
     public async Task<TaskEntity?> SetPlanningStartedAsync(
         string taskId,
         string sessionToken,