Add .NET 10 support to test project and fix CI workflow

- Added net10.0 to test project TargetFrameworks
- Added conditional package reference for Microsoft.AspNetCore.Mvc.Testing 10.0.0
- Removed solution-level build step to allow per-framework restore
- Each test run now handles its own restore+build+test for its target framework
- All three frameworks (net8, net9, net10) now generate and merge coverage

This fixes the "Assets file doesn't have a target for 'net10.0'" error
by ensuring the test project actually targets .NET 10.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: ANcpLua

.github/workflows/tests.yml

@@ -22,14 +22,6 @@ jobs:
             9.0.x
             10.0.x
 
-      - name: Restore dependencies
-        run: |
-          dotnet restore SWEN3.Paperless.RabbitMq.sln
-
-      - name: Build
-        run: |
-          dotnet build SWEN3.Paperless.RabbitMq.sln --no-restore --configuration Release
-
       - name: Run tests for .NET 8 with coverage
         run: |
           dotnet test SWEN3.Paperless.RabbitMq.Tests/SWEN3.Paperless.RabbitMq.Tests.csproj \

SWEN3.Paperless.RabbitMq.Tests/SWEN3.Paperless.RabbitMq.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
+    <TargetFrameworks>net8.0;net9.0;net10.0</TargetFrameworks>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <LangVersion>latestMajor</LangVersion>
@@ -34,6 +34,11 @@
   <ItemGroup Condition="'$(TargetFramework)' == 'net9.0'">
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="9.0.0"/>
   </ItemGroup>
+
+  <ItemGroup Condition="'$(TargetFramework)' == 'net10.0'">
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="10.0.0"/>
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\SWEN3.Paperless.RabbitMq\SWEN3.Paperless.RabbitMq.csproj"/>
   </ItemGroup>