feat: migrate snowflake ids and refresh migrations

src/Domain/TakeoutSaaS.Domain/Merchants/Entities/MerchantContract.cs

@@ -11,7 +11,7 @@ public sealed class MerchantContract : MultiTenantEntityBase
     /// <summary>
     /// 所属商户标识。
     /// </summary>
-    public Guid MerchantId { get; set; }
+    public long MerchantId { get; set; }
 
     /// <summary>
     /// 合同编号。

src/Domain/TakeoutSaaS.Domain/Merchants/Entities/MerchantDocument.cs

@@ -11,7 +11,7 @@ public sealed class MerchantDocument : MultiTenantEntityBase
     /// <summary>
     /// 所属商户标识。
     /// </summary>
-    public Guid MerchantId { get; set; }
+    public long MerchantId { get; set; }
 
     /// <summary>
     /// 证照类型。

src/Domain/TakeoutSaaS.Domain/Merchants/Entities/MerchantStaff.cs

@@ -11,12 +11,12 @@ public sealed class MerchantStaff : MultiTenantEntityBase
     /// <summary>
     /// 所属商户标识。
     /// </summary>
-    public Guid MerchantId { get; set; }
+    public long MerchantId { get; set; }
 
     /// <summary>
     /// 可选的关联门店 ID。
     /// </summary>
-    public Guid? StoreId { get; set; }
+    public long? StoreId { get; set; }
 
     /// <summary>
     /// 员工姓名。
@@ -36,7 +36,7 @@ public sealed class MerchantStaff : MultiTenantEntityBase
     /// <summary>
     /// 登录账号 ID（指向统一身份体系）。
     /// </summary>
-    public Guid? IdentityUserId { get; set; }
+    public long? IdentityUserId { get; set; }
 
     /// <summary>
     /// 员工角色类型。

src/Domain/TakeoutSaaS.Domain/Merchants/Repositories/IMerchantRepository.cs

@@ -0,0 +1,63 @@
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using TakeoutSaaS.Domain.Merchants.Entities;
+using TakeoutSaaS.Domain.Merchants.Enums;
+
+namespace TakeoutSaaS.Domain.Merchants.Repositories;
+
+/// <summary>
+/// 商户聚合仓储契约，提供基础 CRUD 与查询能力。
+/// </summary>
+public interface IMerchantRepository
+{
+    /// <summary>
+    /// 依据标识获取商户。
+    /// </summary>
+    Task<Merchant?> FindByIdAsync(long merchantId, long tenantId, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// 按状态筛选商户列表。
+    /// </summary>
+    Task<IReadOnlyList<Merchant>> SearchAsync(long tenantId, MerchantStatus? status, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// 获取指定商户的员工列表。
+    /// </summary>
+    Task<IReadOnlyList<MerchantStaff>> GetStaffAsync(long merchantId, long tenantId, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// 获取指定商户的合同列表。
+    /// </summary>
+    Task<IReadOnlyList<MerchantContract>> GetContractsAsync(long merchantId, long tenantId, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// 获取指定商户的资质文件列表。
+    /// </summary>
+    Task<IReadOnlyList<MerchantDocument>> GetDocumentsAsync(long merchantId, long tenantId, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// 新增商户主体。
+    /// </summary>
+    Task AddMerchantAsync(Merchant merchant, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// 新增商户员工。
+    /// </summary>
+    Task AddStaffAsync(MerchantStaff staff, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// 新增商户合同。
+    /// </summary>
+    Task AddContractAsync(MerchantContract contract, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// 新增商户资质文件。
+    /// </summary>
+    Task AddDocumentAsync(MerchantDocument document, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// 持久化变更。
+    /// </summary>
+    Task SaveChangesAsync(CancellationToken cancellationToken = default);
+}