refactor: replace internal UnitOfWork with NotificationUnitOfWork and NotificationBaseRepository

- Consolidate unit of work implementation with NotificationUnitOfWork.
- Refactor repositories to use NotificationBaseRepository for consistency.
- Simplify request handlers by removing IUnitOfWork dependency.
- Update related tests and service registration.

HrynCo.NotificationService.DAL.EF/Core/NotificationBaseRepository.cs

@@ -0,0 +1,20 @@
+namespace HrynCo.NotificationService.DAL.EF.Core;
+
+using HrynCo.DAL.Abstract.Entities;
+using HrynCo.DAL.EF.Core;
+
+public abstract class NotificationBaseRepository<TEntity>
+    : BaseRepository<NotificationEfRepository<TEntity>, NotificationDbContext, TEntity, Guid> where TEntity : Entity
+{
+    protected NotificationBaseRepository(NotificationDbContext dbContext)
+    {
+        DbContext = dbContext;
+    }
+
+    private NotificationDbContext DbContext { get; set; }
+
+    protected override NotificationEfRepository<TEntity> CreateEfRepository()
+    {
+        return new NotificationEfRepository<TEntity>(DbContext);
+    }
+}

HrynCo.NotificationService.DAL.EF/Core/NotificationEfRepository.cs

@@ -0,0 +1,13 @@
+namespace HrynCo.NotificationService.DAL.EF.Core;
+
+using HrynCo.DAL.Abstract.Entities;
+using HrynCo.DAL.EF.Core;
+
+public class NotificationEfRepository<TEntity> : BaseEfRepository<NotificationDbContext, TEntity, Guid>
+    where TEntity : class, IEntity<Guid>
+{
+    public NotificationEfRepository(NotificationDbContext dbContext) :
+        base(dbContext)
+    {
+    }
+}

HrynCo.NotificationService.DAL.EF/Core/UnitOfWork.cs

@@ -1,10 +0,0 @@
-using HrynCo.DAL.EF.Core;
-
-namespace HrynCo.NotificationService.DAL.EF.Core;
-
-internal sealed class UnitOfWork : EfUnitOfWork<NotificationDbContext>
-{
-    public UnitOfWork(NotificationDbContext context) : base(context)
-    {
-    }
-}