Add DddDbContext

[rungwiroon]

---------- Review by CodeLleviewer ----------
Summary:
The pull request introduces a new DddDbContext and related entities that follow Domain-Driven Design (DDD) best practices, such as using an Aggregate Root pattern and implementing a protected setter for the entity's Id property. The necessary changes are made to the existing QueryableExtensions class to support this new context.

Additions:

• New DddDbContext added in src/Codehard.Infrastructure/Codehard.Infrastructure.EntityFramework/DbContexts/DddDbContext.cs for Domain-Driven Design related entities, including DddA, DddB and DddC classes, with the proper AggregateRoot pattern implementation and protected setter for the entity's Id property.
• Extension methods added to src/Codehard.Functional/Codehard.Functional.EntityFramework/Extensions/QueryableExtensions.cs class to support IQueryable operations on DddDbContext.
• Test cases added in src/Codehard.Infrastructure/Codehard.Infrastructure.EntityFramework.Tests/DddEntityTests.cs, src/Codehard.Infrastructure/Codehard.Infrastructure.EntityFramework.Tests/DomainEntityTests.cs for DddDbContext, and related entities to ensure proper functionality.

Updates:

• The base Entity class in src/Codehard.Common/Codehard.Common.DomainModel/Entity.cs is updated with a protected setter for the Id property instead of public init accessor.

Deletes:

• Test classes DddA, DddB, and DddC in src/Codehard.Infrastructure/Codehard.Infrastructure.EntityFramework.Tests/Entities/DomainDrivenDesign/ have been removed since they are replaced by their DDD-compliant versions with an AggregateRoot pattern implementation.

Review order:

1. Begin with the high-level changes in src/Codehard.Common/Codehard.Common.DomainModel/Entity.cs. Review how Entity class has been updated to include a protected setter for the Id property.
2. Move on to src/Codehard.Infrastructure/Codehard.Infrastructure.EntityFramework/DbContexts/DddDbContext.cs and check the new DddDbContext implementation, including relationships between DddA, DddB, and DddC entities.
3. Continue with the extension methods in src/Codehard.Functional/Codehard.Functional.EntityFramework/Extensions/QueryableExtensions.cs, which support IQueryable operations on the new DddDbContext.
4. Explore test cases for the new context and entities, starting from src/Codehard.Infrastructure/Codehard.Infrastructure.EntityFramework.Tests/DddEntityTests.cs and then checking src/Codehard.Infrastructure/Codehard.Infrastructure.EntityFramework.Tests/DomainEntityTests.cs.

Suggestions:

• Consider adding a DbContextFactory for easily creating instances of DddDbContext in the tests.
• Think about implementing an OnModelCreating method to separate entity configuration from extension methods in src/Codehard.Infrastructure/Codehard.Infrastructure.EntityFramework/Extensions/ModelBuilderExtensions.cs.
• Explore moving common functionality between different contexts into a shared base class or a set of extension methods for better code reusability.

---------- Review by CodeLleviewer ----------

Summary

The pull request introduces a new DddDbContext and related entities that follow Domain-Driven Design (DDD) best practices, such as using an Aggregate Root pattern and implementing a protected setter for the entity's Id property. The necessary changes are made to the existing QueryableExtensions class to support this new context.
Additions

• A new DddDbContext has been added in src/Codehard.Infrastructure/Codehard.Infrastructure.EntityFramework/DbContexts/DddDbContext.cs for Domain-Driven Design related entities, including DddA, DddB and DddC classes.
• Extension methods have been added to src/Codehard.Functional/Codehard.Functional.EntityFramework/Extensions/QueryableExtensions.cs class to support IQueryable operations on DddDbContext.
• Test cases for the new context and entities have been added in src/Codehard.Infrastructure/Codehard.Infrastructure.EntityFramework.Tests/DddEntityTests.cs and src/Codehard.Infrastructure/Codehard.Infrastructure.EntityFramework.Tests/DomainEntityTests.cs.
  Updates

---

• The base Entity class in src/Codehard.Common/Codehard.Common.DomainModel/Entity.cs is updated with a protected setter for the Id property instead of public init accessor.
  Deletes

---

• Test classes DddA, DddB, and DddC have been removed from src/Codehard.Infrastructure/Codehard.Infrastructure.EntityFramework.Tests/Entities/DomainDrivenDesign/ since they are replaced by their DDD-compliant versions with an AggregateRoot pattern implementation.
  Review order

---

1. Begin with the high-level changes in src/Codehard.Common/Codehard.Common.DomainModel/Entity.cs. Review how Entity class has been updated to include a protected setter for the Id property.
2. Move on to src/Codehard.Infrastructure/Codehard.Infrastructure.EntityFramework/DbContexts/DddDbContext.cs and review the new DDD-compliant entities.
3. Explore test cases for the new context and entities, starting from src/Codehard.Infrastructure/Codehard.Infrastructure.EntityFramework.Tests/DddEntityTests.cs and then checking src/Codehard.Infrastructure/Codehard.Infrastructure.EntityFramework.Tests/DomainEntityTests.cs.
   Security review

---

No sensitive data has been added or exposed in the new codebase.
Suggestions

• Consider adding a DbContextFactory for easily creating instances of DddDbContext in the tests.
• Think about implementing an OnModelCreating method to separate entity configuration from extension methods in src/Codehard.Infrastructure/Codehard.Infrastructure.EntityFramework/Extensions/ModelBuilderExtensions.cs.
• Explore moving common functionality between different contexts into a shared base class or a set of extension methods for better code reusability.