fix: 商户创建时设置默认经营模式为同一主体

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/Infrastructure/TakeoutSaaS.Infrastructure/App/Consumers/TenantCreatedEventConsumer.cs

@@ -1,5 +1,6 @@
 using MassTransit;
 using Microsoft.Extensions.Logging;
+using TakeoutSaaS.Domain.Common.Enums;
 using TakeoutSaaS.Domain.Merchants.Entities;
 using TakeoutSaaS.Domain.Merchants.Enums;
 using TakeoutSaaS.Domain.Merchants.Repositories;
@@ -55,6 +56,7 @@ public sealed class TenantCreatedEventConsumer(
             City = message.City,
             Address = message.Address,
             Status = merchantStatus,
+            OperatingMode = OperatingMode.SameEntity,
             JoinedAt = message.IsSkipApproval ? DateTime.UtcNow : null,
             ApprovedAt = message.IsSkipApproval ? DateTime.UtcNow : null,
             CreatedAt = DateTime.UtcNow