feat: 增强仓储CRUD与种子配置

src/Infrastructure/TakeoutSaaS.Infrastructure/App/Repositories/EfMerchantRepository.cs

@@ -113,4 +113,26 @@ public sealed class EfMerchantRepository : IMerchantRepository
     {
         return _context.SaveChangesAsync(cancellationToken);
     }
+
+    /// <inheritdoc />
+    public Task UpdateMerchantAsync(Merchant merchant, CancellationToken cancellationToken = default)
+    {
+        _context.Merchants.Update(merchant);
+        return Task.CompletedTask;
+    }
+
+    /// <inheritdoc />
+    public async Task DeleteMerchantAsync(long merchantId, long tenantId, CancellationToken cancellationToken = default)
+    {
+        var existing = await _context.Merchants
+            .Where(x => x.TenantId == tenantId && x.Id == merchantId)
+            .FirstOrDefaultAsync(cancellationToken);
+
+        if (existing == null)
+        {
+            return;
+        }
+
+        _context.Merchants.Remove(existing);
+    }
 }