Refactored ControllerExtensions: moved user claim extraction
methods from EnvelopeGenerator.API.Controllers to the new
EnvelopeGenerator.API.Extensions namespace. Updated all
references and using statements accordingly. No logic changes;
improves code organization and clarity.
Refactored EnvelopeAuthExtensions to require presence of all key authentication claims. Added GetRequiredClaim helper that throws detailed exceptions if claims are missing or invalid, replacing nullable return types with non-nullable ones. This ensures authentication logic fails fast and provides clearer error messages when claims are misconfigured or tampered with.
Replaced all EnvelopeGenerator.GeneratorAPI namespaces with EnvelopeGenerator.API across controllers, models, extensions, middleware, and annotation-related files. Updated using/import statements and namespace declarations accordingly. Added wwwroot folder to project file. Minor code adjustments made for consistency. This unifies API naming for improved clarity and maintainability.
Deleted dotnet-tools.json (dotnet-ef config) and IIS publish profiles for .NET 7 and .NET 9 (IISProfileNet7Win64.pubxml, IISProfileNet9Win64.pubxml) to clean up unused deployment and tooling files.
