Refactor MediatR package references

Replaced MediatR with MediatR.Contracts in the Domain project to avoid
bringing in unnecessary dependencies. Added full MediatR package to the
Application project, where request handling occurs.

Author: jasontaylordev

Directory.Packages.props

@@ -16,6 +16,7 @@
     <PackageVersion Include="FluentValidation.AspNetCore" Version="11.3.0" />
     <PackageVersion Include="FluentValidation.DependencyInjectionExtensions" Version="11.11.0" />
     <PackageVersion Include="MediatR" Version="12.4.1" />
+    <PackageVersion Include="MediatR.Contracts" Version="2.0.1" />
     <PackageVersion Include="Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore" Version="$(AspnetVersion)" />
     <PackageVersion Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="$(AspnetVersion)" />
     <PackageVersion Include="Microsoft.AspNetCore.Mvc.Testing" Version="$(AspnetVersion)" />
@@ -40,25 +41,21 @@
     <PackageVersion Include="Respawn" Version="6.2.1" />
     <PackageVersion Include="Shouldly" Version="4.3.0" />
     <PackageVersion Include="System.Configuration.ConfigurationManager" Version="9.0.0" />
-
     <!--#if(!UseApiOnly)-->
     <PackageVersion Include="Microsoft.AspNetCore.SpaProxy" Version="$(AspnetVersion)" />
     <PackageVersion Include="Microsoft.Playwright" Version="1.48.0" />
     <PackageVersion Include="SpecFlow.Plus.LivingDocPlugin" Version="3.9.57" />
     <PackageVersion Include="SpecFlow.NUnit" Version="3.9.74" />
     <!--#endif-->
-    
     <!--#if (UseAspire)-->
     <!--#if (UsePostgreSQL)-->
     <PackageVersion Include="Aspire.Npgsql.EntityFrameworkCore.PostgreSQL" Version="$(AspireVersion)" />
     <PackageVersion Include="Aspire.Hosting.PostgreSQL" Version="$(AspireVersion)" />
     <!--#endif-->
-    
     <!--#if (UseSqlServer)-->
     <PackageVersion Include="Aspire.Microsoft.EntityFrameworkCore.SqlServer" Version="$(AspireVersion)" />
     <PackageVersion Include="Aspire.Hosting.SqlServer" Version="$(AspireVersion)" />
     <!--#endif-->
-    
     <PackageVersion Include="Aspire.Hosting.AppHost" Version="$(AspireVersion)" />
     <PackageVersion Include="Microsoft.Extensions.Http.Resilience" Version="9.0.0" />
     <PackageVersion Include="Microsoft.Extensions.ServiceDiscovery" Version="9.0.0" />
@@ -68,16 +65,13 @@
     <PackageVersion Include="OpenTelemetry.Instrumentation.Http" Version="1.9.0" />
     <PackageVersion Include="OpenTelemetry.Instrumentation.Runtime" Version="1.9.0" />
     <!--#endif-->
-    
     <!--#if (UsePostgreSQL)-->
     <PackageVersion Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="9.0.1" />
     <PackageVersion Include="Testcontainers.PostgreSql" Version="4.0.0" />
     <!--#endif-->
-    
     <!--#if (UseSqlite)-->
     <PackageVersion Include="Microsoft.EntityFrameworkCore.Sqlite" Version="$(EfcoreVersion)" />
     <!--#endif-->
-    
     <!--#if (UseSqlServer)-->
     <PackageVersion Include="Microsoft.EntityFrameworkCore.SqlServer" Version="$(EfcoreVersion)" />
     <PackageVersion Include="Testcontainers.MsSql" Version="4.0.0" />

src/Application/Application.csproj

@@ -9,6 +9,7 @@
     <PackageReference Include="Ardalis.GuardClauses" />
     <PackageReference Include="AutoMapper" />
     <PackageReference Include="FluentValidation.DependencyInjectionExtensions" />
+    <PackageReference Include="MediatR" />
     <PackageReference Include="Microsoft.EntityFrameworkCore" />
     <PackageReference Include="Microsoft.Extensions.Hosting" />
   </ItemGroup>

src/Domain/Domain.csproj

@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="MediatR" />
+    <PackageReference Include="MediatR.Contracts" />
   </ItemGroup>
 
 </Project>