feat: initial solution with HrynCo.DAL.Abstract and HrynCo.DAL.EF

- HrynCo.DAL.Abstract: IEntity<TId>, Entity base classes, ITransaction, IUnitOfWork
- HrynCo.DAL.EF: EfRepository<TDbContext,TEntity>, EfUnitOfWork<TDbContext>, EfTransactionAdapter
- Directory.Packages.props with centralized EF Core 9.0.5 versions
- TeamCity pipeline YAMLs for general-checks and publish

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

HrynCo.DAL.Abstract/Entities/Entity.cs

@@ -0,0 +1,25 @@
+namespace HrynCo.DAL.Abstract.Entities;
+
+[Serializable]
+public abstract class Entity<TId> : IEntity<TId> where TId : struct
+{
+    public TId Id { get; set; }
+    public DateTimeOffset Created { get; set; }
+    public DateTimeOffset? Updated { get; set; }
+}
+
+[Serializable]
+public abstract class Entity : Entity<Guid>
+{
+    protected Entity()
+    {
+        Id = Guid.NewGuid();
+        Created = DateTimeOffset.UtcNow;
+    }
+
+    protected Entity(Guid id)
+    {
+        Id = id;
+        Created = DateTimeOffset.UtcNow;
+    }
+}

HrynCo.DAL.Abstract/Entities/IEntity.cs

@@ -0,0 +1,8 @@
+namespace HrynCo.DAL.Abstract.Entities;
+
+public interface IEntity<TId> where TId : struct
+{
+    TId Id { get; set; }
+    DateTimeOffset Created { get; set; }
+    DateTimeOffset? Updated { get; set; }
+}

HrynCo.DAL.Abstract/HrynCo.DAL.Abstract.csproj

@@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <RootNamespace>HrynCo.DAL.Abstract</RootNamespace>
+    <PackageId>HrynCo.DAL.Abstract</PackageId>
+    <Authors>HrynCo</Authors>
+    <Description>Abstract DAL contracts for HrynCo applications: entities, repository and unit-of-work interfaces.</Description>
+    <PackageTags>hrynco dal abstract entity repository unitofwork</PackageTags>
+    <RepositoryType>git</RepositoryType>
+    <RepositoryUrl>https://gitea.grynco.com.ua/hrynco/hrynco-ef.git</RepositoryUrl>
+  </PropertyGroup>
+
+</Project>

HrynCo.DAL.Abstract/ITransaction.cs

@@ -0,0 +1,7 @@
+namespace HrynCo.DAL.Abstract;
+
+public interface ITransaction : IAsyncDisposable
+{
+    Task CommitAsync(CancellationToken cancellationToken = default);
+    Task RollbackAsync(CancellationToken cancellationToken = default);
+}

HrynCo.DAL.Abstract/IUnitOfWork.cs

@@ -0,0 +1,11 @@
+namespace HrynCo.DAL.Abstract;
+
+public interface IUnitOfWork
+{
+    Task SaveChangesAsync(CancellationToken cancellationToken = default);
+    Task<ITransaction> BeginTransactionAsync(CancellationToken cancellationToken = default);
+    ITransaction? GetCurrentTransaction();
+
+    Task ExecuteInTransactionAsync(Func<Task> action);
+    Task<TResult> ExecuteInTransactionAsync<TResult>(Func<Task<TResult>> action);
+}