feat: add Serilog with Console and Seq sinks, log TransactionBehavior

- Add Serilog.AspNetCore + Sinks.Console + Sinks.Seq to Api
- Add Serilog.Extensions.Hosting + Sinks.Console + Sinks.Seq to Worker
- Add Microsoft.Extensions.Logging.Abstractions to Services
- TransactionBehavior logs handler name, elapsed time, and errors

Ref: IT-628

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

Directory.Packages.props

@@ -15,8 +15,15 @@
         <PackageVersion Include="Microsoft.Extensions.Hosting" Version="10.0.6" />
         <PackageVersion Include="Microsoft.Extensions.Hosting.Abstractions" Version="10.0.6" />
         <PackageVersion Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="10.0.6" />
+        <PackageVersion Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.6" />
         <PackageVersion Include="Microsoft.AspNetCore.OpenApi" Version="10.0.6" />
 
+        <!-- Serilog -->
+        <PackageVersion Include="Serilog.AspNetCore" Version="9.0.0" />
+        <PackageVersion Include="Serilog.Extensions.Hosting" Version="9.0.0" />
+        <PackageVersion Include="Serilog.Sinks.Console" Version="6.0.0" />
+        <PackageVersion Include="Serilog.Sinks.Seq" Version="9.0.0" />
+
         <!-- HrynCo shared packages -->
         <PackageVersion Include="HrynCo.RabbitMq" Version="1.0.11" />
 

HrynCo.NotificationService.Api/HrynCo.NotificationService.Api.csproj

@@ -8,6 +8,9 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" />
+    <PackageReference Include="Serilog.AspNetCore" />
+    <PackageReference Include="Serilog.Sinks.Console" />
+    <PackageReference Include="Serilog.Sinks.Seq" />
   </ItemGroup>
 
   <ItemGroup>

HrynCo.NotificationService.Services/Behaviors/TransactionBehavior.cs

@@ -1,5 +1,7 @@
+using System.Diagnostics;
 using HrynCo.NotificationService.DAL.Abstract;
 using MediatR;
+using Microsoft.Extensions.Logging;
 
 namespace HrynCo.NotificationService.Services.Behaviors;
 
@@ -7,19 +9,36 @@ public class TransactionBehavior<TRequest, TResponse> : IPipelineBehavior<TReque
     where TRequest : notnull
 {
     private readonly IUnitOfWork _unitOfWork;
+    private readonly ILogger<TransactionBehavior<TRequest, TResponse>> _logger;
 
-    public TransactionBehavior(IUnitOfWork unitOfWork)
+    public TransactionBehavior(IUnitOfWork unitOfWork, ILogger<TransactionBehavior<TRequest, TResponse>> logger)
     {
         _unitOfWork = unitOfWork;
+        _logger = logger;
     }
 
-    public Task<TResponse> Handle(TRequest request, RequestHandlerDelegate<TResponse> next, CancellationToken cancellationToken)
+    public async Task<TResponse> Handle(TRequest request, RequestHandlerDelegate<TResponse> next, CancellationToken cancellationToken)
     {
-        return _unitOfWork.ExecuteInTransactionAsync(async () =>
+        string handlerName = typeof(TRequest).Name;
+        _logger.LogDebug("Handling {Handler}", handlerName);
+
+        Stopwatch sw = Stopwatch.StartNew();
+        try
         {
-            TResponse result = await next();
+            TResponse result = await _unitOfWork.ExecuteInTransactionAsync(async () =>
+            {
+                TResponse response = await next();
                 await _unitOfWork.SaveChangesAsync(cancellationToken);
-            return result;
+                return response;
             });
+
+            _logger.LogDebug("Handled {Handler} in {ElapsedMs}ms", handlerName, sw.ElapsedMilliseconds);
+            return result;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Handler {Handler} failed after {ElapsedMs}ms", handlerName, sw.ElapsedMilliseconds);
+            throw;
+        }
     }
 }

HrynCo.NotificationService.Services/HrynCo.NotificationService.Services.csproj

@@ -2,6 +2,7 @@
 
   <ItemGroup>
     <PackageReference Include="MediatR" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" />
   </ItemGroup>
 
   <ItemGroup>

HrynCo.NotificationService.Worker/HrynCo.NotificationService.Worker.csproj

@@ -9,6 +9,9 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Hosting" />
+    <PackageReference Include="Serilog.Extensions.Hosting" />
+    <PackageReference Include="Serilog.Sinks.Console" />
+    <PackageReference Include="Serilog.Sinks.Seq" />
   </ItemGroup>
 
   <ItemGroup>