Refactor CRUDRepository for improved flexibility

- Added using directives for new application interfaces.
- Removed constraint for IUnique<TId> from TEntity.
- Updated CountAsync method to use GetId() for identifier retrieval.

DigitalData.Core.Infrastructure/CRUDRepository.cs

@@ -1,4 +1,5 @@
 using DigitalData.Core.Abstractions;
+using DigitalData.Core.Application;
 using DigitalData.Core.Application.Interfaces.Repository;
 using Microsoft.EntityFrameworkCore;
 
@@ -15,7 +16,7 @@ namespace DigitalData.Core.Infrastructure
     /// It leverages the EF Core's DbContext and DbSet to perform these operations.
     /// </remarks>
     public class CRUDRepository<TEntity, TId, TDbContext> : ICRUDRepository<TEntity, TId>
-        where TEntity : class, IUnique<TId>
+        where TEntity : class
         where TDbContext : DbContext
     {
         protected readonly TDbContext _dbContext;
@@ -107,6 +108,6 @@ namespace DigitalData.Core.Infrastructure
         /// If there are multiple entities with the same identifier, they will all be counted. 
         /// The default implementation assumes that the identifier is unique for each entity.
         /// </remarks>
-        public virtual async Task<int> CountAsync(TId id) => await _dbSet.Where(e => e.Id!.Equals(id)).CountAsync();
+        public virtual async Task<int> CountAsync(TId id) => await _dbSet.Where(e => e.GetId().Equals(id)).CountAsync();
     }
 }