feat: Update Database Seeding Implementation for EF Core 9 Compatibility

[Kamyab7]

This pull request refactors the database initialization and seeding logic to utilize the new UseAsyncSeeding method introduced in EF Core 9, improving the seeding process for the Clean Architecture project. The changes ensure better asynchronous handling during database setup and enhance maintainability.

Changes:

1. New AddAsyncSeeding Method:

   • Introduced an extension method AddAsyncSeeding that configures the DbContextOptionsBuilder to use the new UseAsyncSeeding method.
   • This method ensures that the seeding logic runs asynchronously, with service provider access to perform necessary operations like creating default roles and users.

2. Refactored ApplicationDbContextInitialiser:

   • The seeding logic in ApplicationDbContextInitialiser was retained but refactored to work seamlessly with the new EF Core 9 seeding mechanism.
   • This includes default role and user creation, as well as seeding default data like TodoList and TodoItems.

3. Seeding on Database Provider Configuration:

   • Updated the AddDbContext method in the AddInfrastructureServices class to integrate AddAsyncSeeding with all supported database providers (PostgreSQL, SQLite, SQL Server).
   • Ensured that the seeding logic will run after the database is created or migrated.

4. Separate Initialization and Seeding:

   • Kept the database initialization (InitialiseAsync) and seeding (SeedAsync) separated to maintain clarity and avoid redundant operations.

Benefits:

• Aligns the project with EF Core 9’s new async seeding approach, offering better performance and scalability.
• Enhances code maintainability by organizing seeding into a separate method and using modern patterns.
• Improves the overall setup process of the database and ensures default data is added seamlessly.

How to Test:

1. Ensure that the application starts correctly with any of the supported database providers (PostgreSQL, SQLite, SQL Server).
2. Check the database to confirm that the default roles, users, and data (like TodoList and TodoItems) are seeded correctly.
3. Verify that the application can handle database migrations properly when starting up.

Additional Notes:

• This change requires EF Core 9 and may require some project setup adjustments if you're working with a different version of EF Core.
• The new seeding mechanism is backward compatible but leverages EF Core 9 features for improved efficiency.

[Kamyab7]

This pull request closes #1293