refactor: replace local dal abstractions with hrynco-ef packages

Remove duplicate IEntity, Entity, ITransaction, IUnitOfWork, EfRepository,
EfUnitOfWork, EfTransactionAdapter — now consumed from HrynCo.DAL.Abstract
and HrynCo.DAL.EF packages (1.0.1).

Ref: IT-0

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

@@ -1,45 +0,0 @@
-using System.Linq.Expressions;
-using Microsoft.EntityFrameworkCore;
-
-namespace HrynCo.NotificationService.DAL.EF.Core;
-
-internal abstract class EfRepository<TEntity>
-    where TEntity : class
-{
-    protected NotificationDbContext DbContext { get; }
-    protected DbSet<TEntity> DbSet { get; }
-
-    protected EfRepository(NotificationDbContext dbContext)
-    {
-        DbContext = dbContext;
-        DbSet = dbContext.Set<TEntity>();
-    }
-
-    protected async Task AddAsync(TEntity entity, CancellationToken ct = default)
-    {
-        await DbSet.AddAsync(entity, ct);
-    }
-
-    protected async Task AddRangeAsync(IEnumerable<TEntity> entities, CancellationToken ct = default)
-    {
-        await DbSet.AddRangeAsync(entities, ct);
-    }
-
-    protected void Update(TEntity entity)
-    {
-        DbSet.Update(entity);
-    }
-
-    protected void Delete(TEntity entity)
-    {
-        DbSet.Remove(entity);
-    }
-
-    protected void DeleteRange(IEnumerable<TEntity> entities)
-    {
-        DbSet.RemoveRange(entities);
-    }
-
-    protected Task<bool> ExistsAsync(Expression<Func<TEntity, bool>> predicate, CancellationToken ct = default) =>
-        DbSet.AnyAsync(predicate, ct);
-}

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

@@ -1,29 +0,0 @@
-using HrynCo.NotificationService.DAL.Abstract;
-using Microsoft.EntityFrameworkCore.Storage;
-
-namespace HrynCo.NotificationService.DAL.EF.Core;
-
-internal sealed class EfTransactionAdapter : ITransaction
-{
-    private readonly IDbContextTransaction _transaction;
-
-    internal EfTransactionAdapter(IDbContextTransaction transaction)
-    {
-        _transaction = transaction;
-    }
-
-    public Task CommitAsync(CancellationToken cancellationToken = default)
-    {
-        return _transaction.CommitAsync(cancellationToken);
-    }
-
-    public Task RollbackAsync(CancellationToken cancellationToken = default)
-    {
-        return _transaction.RollbackAsync(cancellationToken);
-    }
-
-    public ValueTask DisposeAsync()
-    {
-        return _transaction.DisposeAsync();
-    }
-}

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

@@ -1,105 +0,0 @@
-using HrynCo.NotificationService.DAL.Abstract;
-using Microsoft.EntityFrameworkCore;
-using Microsoft.EntityFrameworkCore.Storage;
-
-namespace HrynCo.NotificationService.DAL.EF.Core;
-
-internal abstract class EfUnitOfWork<TDbContext> : IUnitOfWork
-    where TDbContext : DbContext
-{
-    private readonly TDbContext _context;
-    private EfTransactionAdapter? _currentTransaction;
-
-    protected EfUnitOfWork(TDbContext context)
-    {
-        _context = context;
-    }
-
-    public Task SaveChangesAsync(CancellationToken cancellationToken = default)
-    {
-        return _context.SaveChangesAsync(cancellationToken);
-    }
-
-    public async Task<ITransaction> BeginTransactionAsync(CancellationToken cancellationToken = default)
-    {
-        if (_currentTransaction != null)
-        {
-            return _currentTransaction;
-        }
-
-        IDbContextTransaction tx = await _context.Database.BeginTransactionAsync(cancellationToken);
-        _currentTransaction = new EfTransactionAdapter(tx);
-        return _currentTransaction;
-    }
-
-    public ITransaction? GetCurrentTransaction()
-    {
-        return _currentTransaction;
-    }
-
-    public async Task ExecuteInTransactionAsync(Func<Task> action)
-    {
-        ITransaction? existing = GetCurrentTransaction();
-        bool ownsTransaction = existing is null;
-        ITransaction tx = existing ?? await BeginTransactionAsync();
-
-        try
-        {
-            await action();
-            if (ownsTransaction)
-            {
-                await tx.CommitAsync();
-            }
-        }
-        catch
-        {
-            if (ownsTransaction)
-            {
-                await tx.RollbackAsync();
-            }
-
-            throw;
-        }
-        finally
-        {
-            if (ownsTransaction)
-            {
-                await tx.DisposeAsync();
-            }
-        }
-    }
-
-    public async Task<TResult> ExecuteInTransactionAsync<TResult>(Func<Task<TResult>> action)
-    {
-        ITransaction? existing = GetCurrentTransaction();
-        bool ownsTransaction = existing is null;
-        ITransaction tx = existing ?? await BeginTransactionAsync();
-
-        try
-        {
-            TResult result = await action();
-            if (ownsTransaction)
-            {
-                await tx.CommitAsync();
-            }
-
-            return result;
-        }
-        catch
-        {
-            if (ownsTransaction)
-            {
-                await tx.RollbackAsync();
-            }
-
-            throw;
-        }
-        finally
-        {
-            if (ownsTransaction)
-            {
-                await tx.DisposeAsync();
-            }
-        }
-    }
-}

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

@@ -1,3 +1,5 @@
+using HrynCo.DAL.EF.Core;
+
 namespace HrynCo.NotificationService.DAL.EF.Core;
 
 internal sealed class UnitOfWork : EfUnitOfWork<NotificationDbContext>