Introduce `JobRunnerDbContext` to support both EF6 (.NET 4.8)
and EF Core (.NET 8) using conditional compilation. Add `DbSet`
properties for `CfgProfiles`, `ProfileSqlJobs`, and
`ProfileHistories`. Provide constructors for both frameworks
to handle connection strings or options. Ensure compatibility
with multiple runtime environments.
Two new projects, `ECMJobRunner.Application` and
`ECMJobRunner.Infrastructure`, were added to the solution file
(`ECM.JobRunner.sln`). Build configurations for these projects
were also added.
`ECMJobRunner.Application.csproj` targets both .NET Framework 4.8
and .NET 8.0, with properties such as `LangVersion`, `Nullable`,
and `PackageId` defined.
`ECMJobRunner.Infrastructure.csproj` also targets .NET Framework
4.8 and .NET 8.0. It includes conditional dependencies:
- For `net480`, it references `EntityFramework` 6.5.1.
- For `net8.0`, it references `Microsoft.EntityFrameworkCore`
and related packages (version 8.0.11).
