Renamed `Profile` to `CfgProfile` across the codebase for clarity and consistency. Updated property constraints in `CfgProfile.cs`, `ProfileHistory.cs`, and `ProfileSqlJob.cs` to include maximum length validations. Changed navigation properties in `CfgProfile.cs` to use `IEnumerable` and made them nullable. Updated `ForeignKey` attributes in `ProfileHistory.cs` and `ProfileSqlJob.cs` to reference `CfgProfile`. Improved property descriptions for better documentation.
Introduced the `ECMJobRunner.Domain` project to support both
.NET Framework 4.8 and .NET 8.0. Added `Profile`,
`ProfileSqlJob`, and `ProfileHistory` entities to map to the
database schema, including relationships and audit fields.
Updated `ECMJobRunner.Domain.csproj` to enable multi-targeting
and added dependencies for Entity Framework 6.5.1 and EF Core
8.0.11. Enabled nullable reference types and set the language
version to `latest`.
Added comprehensive documentation in `AGENTS.md` detailing the
project structure, entities, database schema, and build
instructions.
