Pin FluentAssertions to 7.2.2 (last Apache-2.0 release)

v8.x moved to a paid commercial license. Stay on 7.x and tell
dependabot to ignore >=8.0.0.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: TestingBot

.github/dependabot.yml

@@ -9,6 +9,10 @@ updates:
       microsoft-extensions:
         patterns:
           - "Microsoft.Extensions.*"
+    ignore:
+      # FluentAssertions 8.x switched to a paid commercial license; stay on 7.x (Apache-2.0)
+      - dependency-name: "FluentAssertions"
+        versions: [">=8.0.0"]
 
   - package-ecosystem: github-actions
     directory: "/"

Directory.Packages.props

@@ -23,7 +23,7 @@
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageVersion Include="xunit" Version="2.9.2" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" />
-    <PackageVersion Include="FluentAssertions" Version="6.12.2" />
+    <PackageVersion Include="FluentAssertions" Version="7.2.2" />
     <PackageVersion Include="RichardSzalay.MockHttp" Version="7.0.0" />
     <PackageVersion Include="coverlet.collector" Version="6.0.2" />
   </ItemGroup>