Version 1.4

[nogginbox]

Release 1.4.0

What's changed

• Upgraded to .NET 8.0: All projects, NuGet packages, Docker images, and CI workflows updated from .NET 7 to .NET 8
• New solution format: Migrated from .sln to the new .slnx XML format (requires .NET 9+ SDK or VS 2022 17.10+)
• Configurable callback URL host: Added CallbackUrlHost option to ProviderConfig for explicitly setting the host/port in OAuth callback URLs. Needed when running behind a reverse proxy (e.g. YARP, NGINX) where auto-detection doesn't work.
• ILogger per provider: Each provider now receives a typed ILogger<T> via ILoggerFactory, enabling structured logging with proper category names
• xunit v3: Migrated test framework from xunit 2.x to xunit.v3 3.2.2
• Nullability cleanup: Tightened annotations on AuthConfigSection, ProviderConfig, and JsonSerializerExtensions
• CI updates: GitHub Actions bumped to actions/checkout@v4 and actions/setup-dotnet@v4

Test plan

• All 21 tests pass on .NET 8
• Smoke test sample site
• Verify NuGet package builds correctly as 1.4.0
• Test callback URL host override behind a reverse proxy