EF Core 8无法生成迁移文件，多种排查无效求助

近一个月来完全无法使用EF Core 8创建任何迁移文件，此前该功能一直正常，现在就连本地原本能生成迁移的分支也失效了。

以下是执行add-migration命令的项目中，*.csproj文件里的EF Core相关包引用：

<PackageReference Include="Microsoft.EntityFrameworkCore" Version="8.0.2" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Abstractions" Version="8.0.2" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.2">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageReference>
<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="8.0.2" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="8.0.2">
    <PrivateAssets>all</PrivateAssets>
    <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageReference>

已尝试的排查操作：

• 添加了DesignTimeDbContextFactory
• 检查ApplicationDbContext配置及对应模型的DbSet<>是否正确添加
• 确保ApplicationDbContext包含无参构造函数
• 已在Program.cs中注册ApplicationDbContext
• 验证数据库连接字符串正确且能正常连接
• 通过Github Copilot排查，未检测到错误
• 删除现有迁移文件和Snapshot文件，问题仍未解决

调试后确认以下代码均能正常工作：

public class ApplicationDbContext : DbContext
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options) : base(options) { }
    public ApplicationDbContext()
    {
    }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        var configuration = new ConfigurationBuilder()
            .SetBasePath(AppDomain.CurrentDomain.BaseDirectory)
            .AddJsonFile("appsettings.json")
            .Build();

        optionsBuilder.UseSqlServer(configuration.GetConnectionString("DefaultConnection"));
        base.OnConfiguring(optionsBuilder);
    }

    // 所有DbSet定义如下：
    public DbSet<MyEntity> MyEntities => Set<MyEntity>();
}

public class DesignTimeDbContextFactory : IDesignTimeDbContextFactory<ApplicationDbContext>
{
    public ApplicationDbContext CreateDbContext(string[] args)
    {
        var configuration = new ConfigurationBuilder()
                        .SetBasePath(AppDomain.CurrentDomain.BaseDirectory)
                        .AddJsonFile("appsettings.json")
                        .Build();
        var optionsBuilder = new DbContextOptionsBuilder<ApplicationDbContext>();
        optionsBuilder.UseSqlServer(configuration.GetConnectionString("DefaultConnection"));

        return new ApplicationDbContext(optionsBuilder.Options);
    }
}

更新：
将ApplicationDbContext迁移至独立项目后，问题解决。实体类原本就处于独立项目中，因此无需额外迁移实体类。

内容的提问来源于stack exchange，提问作者m3xpl4y