Add back .NET 10 test with coverage collection

.NET 10 was released 9 days ago and should be included in coverage.
Added the net10.0 test step and included its coverage file in the merge.

All three frameworks (net8, net9, net10) now generate coverage reports
that are merged before uploading to Codecov.

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

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

Author: ANcpLua

.github/workflows/tests.yml

@@ -48,6 +48,15 @@ jobs:
             /p:CoverletOutputFormat=cobertura \
             /p:CoverletOutput=TestResults/coverage-net9.cobertura.xml
 
+      - name: Run tests for .NET 10 with coverage
+        run: |
+          dotnet test SWEN3.Paperless.RabbitMq.Tests/SWEN3.Paperless.RabbitMq.Tests.csproj \
+            -f net10.0 \
+            /p:Configuration=Release \
+            /p:CollectCoverage=true \
+            /p:CoverletOutputFormat=cobertura \
+            /p:CoverletOutput=TestResults/coverage-net10.cobertura.xml
+
       - name: Verify coverage files exist
         run: |
           echo "Listing coverage files:"
@@ -59,7 +68,7 @@ jobs:
       - name: Merge coverage reports
         run: |
           reportgenerator \
-            -reports:"SWEN3.Paperless.RabbitMq.Tests/TestResults/coverage-net8.cobertura.xml;SWEN3.Paperless.RabbitMq.Tests/TestResults/coverage-net9.cobertura.xml" \
+            -reports:"SWEN3.Paperless.RabbitMq.Tests/TestResults/coverage-net8.cobertura.xml;SWEN3.Paperless.RabbitMq.Tests/TestResults/coverage-net9.cobertura.xml;SWEN3.Paperless.RabbitMq.Tests/TestResults/coverage-net10.cobertura.xml" \
             -targetdir:"./coverage-merged" \
             -reporttypes:"Cobertura"