移除历史状态归一化及相关遗留逻辑

- 移除 LegacyStatusNormalizationMigrator，仅保留 AreaLayoutModeDefaultMigrator
- 删除 WmsDispatchStatus 枚举、常量和全局 using
- 统一所有 DbContext 注入为 MiGuDbContext，移除 PlatformDbContext
- 服务实体操作统一用 IEditableRepository<T>，移除本地实现
- 移除 WmsService 的 MigrateLegacyAsync 方法
- 精简接口模型，移除部分字段和请求体
- 前端保存容器时 status 字段取自已有数据，移除写死默认值
- 更新文档，去除旧说明，统一数据库初始化流程

MiGu.Server/Wms/WmsTransportTaskService.cs

@@ -6,14 +6,14 @@ namespace MiGu.Server.Wms;
 
 public sealed class WmsTransportTaskService
 {
-    private readonly PlatformDbContext _db;
+    private readonly MiGuDbContext _db;
     private readonly WmsTransportPlanner _planner;
     private readonly WmsService _wms;
     private readonly IWmsDispatchAdapter _dispatch;
     private readonly JsonSerializerOptions _json = new(JsonSerializerDefaults.Web);
 
     public WmsTransportTaskService(
-        PlatformDbContext db,
+        MiGuDbContext db,
         WmsTransportPlanner planner,
         WmsService wms,
         IWmsDispatchAdapter dispatch)
@@ -331,7 +331,7 @@ public sealed class WmsTransportTaskService
         GeneratedAt = DateTimeOffset.UtcNow
     };
 
-    private static void StampCreate(EntityBase entity, string actor)
+    private static void StampCreate(AggregateRoot entity, string actor)
     {
         entity.CreatedBy = actor;
         entity.UpdatedBy = actor;