refactor(workflow): 简化设计时数据库上下文工厂配置

- 移除对 Microsoft.Extensions.Configuration 的依赖
- 删除复杂的 appsettings.json 配置文件查找逻辑
- 将连接字符串改为硬编码方式
- 更新数据库端口为 15432 并修改密码为 dev
- 精简注释说明

feat(im): 添加 MongoDB Entities 包支持

- 引入 MongoDB.Entities 25.1.0 版本依赖
- 升级 MongoDB.Driver 从 3.4.

src/modules/im/Infrastructure/IM.Infrastructure.csproj

@@ -7,6 +7,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.EntityFrameworkCore" Version="10.0.7" />
+    <PackageReference Include="MongoDB.Entities" Version="25.1.0" />
     <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="10.0.1" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="10.0.7" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.7">
@@ -14,7 +15,7 @@
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
     <PackageReference Include="StackExchange.Redis" Version="2.8.31" />
-    <PackageReference Include="MongoDB.Driver" Version="3.4.0" />
+    <PackageReference Include="MongoDB.Driver" Version="3.8.1" />
     <PackageReference Include="Volo.Abp.Core" Version="10.3.0" />
   </ItemGroup>
   <ItemGroup>

src/modules/workflow/Infrastructure/Persistence/WorkflowDbContextDesignTimeFactory.cs

@@ -1,39 +1,17 @@
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Design;
-using Microsoft.Extensions.Configuration;
 
 namespace Workflow.Infrastructure.Persistence;
 
-/// <summary>
-/// EF Core 设计时工厂，供 dotnet ef migrations 命令使用。
-/// 关键：必须启用 UseSnakeCaseNamingConvention（与运行时一致），否则迁移会用 PascalCase 列名。
-/// </summary>
+/// <summary>EF Core 设计时工厂。硬编码连接串，不依赖 appsettings 路径。</summary>
 public class WorkflowDbContextDesignTimeFactory : IDesignTimeDbContextFactory<WorkflowDbContext>
 {
     public WorkflowDbContext CreateDbContext(string[] args)
     {
-        // 向上查找 Api 项目的 appsettings.json（兼容不同工作目录）
-        var basePath = Path.Combine(Directory.GetCurrentDirectory(), "..", "Workflow.Api");
-        if (!Directory.Exists(basePath))
-        {
-            // 如果从 Infrastructure 目录运行，尝试另一种路径
-            basePath = Path.Combine(Directory.GetCurrentDirectory(), "..", "Api");
-        }
-
-        var config = new ConfigurationBuilder()
-            .SetBasePath(basePath)
-            .AddJsonFile("appsettings.json", optional: true)
-            .Build();
-
-        var connectionString = config.GetConnectionString("Default")
-            ?? config.GetConnectionString("Workflow")
-            ?? "Host=localhost;Port=5432;Database=workflow;Username=rag;Password=REDACTED_DEV_PASSWORD";
-
         var options = new DbContextOptionsBuilder<WorkflowDbContext>()
-            .UseNpgsql(connectionString)
+            .UseNpgsql("Host=localhost;Port=15432;Database=workflow;Username=rag;Password=dev")
             .UseSnakeCaseNamingConvention()
             .Options;
-
         return new WorkflowDbContext(options);
     }
 }