feat: upgrade application to .NET 10

Preserve configuration defaults with the .NET 10 binder and update
dependencies, Docker builds, CI, and test tooling.

CaddyManager.Tests/README.md

@@ -66,7 +66,7 @@ Coverage reports exclude:
 ## Test Frameworks and Libraries
 
 - **xUnit**: Primary testing framework
-- **FluentAssertions**: For readable assertions
+- **AwesomeAssertions**: For readable assertions
 - **Moq**: For mocking dependencies
 - **Coverlet**: For code coverage analysis
 
@@ -122,7 +122,7 @@ Common test data is provided through the `TestHelper` class:
 2. **Single Responsibility**: Each test should verify one specific behavior
 3. **Independence**: Tests should not depend on each other and should be able to run in any order
 4. **Cleanup**: Use `IDisposable` or cleanup methods to remove temporary resources
-5. **Readable Assertions**: Use FluentAssertions for more readable test assertions
+5. **Readable Assertions**: Use AwesomeAssertions for more readable test assertions
 6. **Mock Verification**: Verify that mocked methods are called as expected when relevant
 
 ## Continuous Integration