Add repository registration to DI setup

Added RegsRepository.InvokeAll(services) to the dependency injection configuration, ensuring repository types are registered alongside entities and DbSet factories.

DigitalData.Core.Infrastructure/DependencyInjection.cs

@@ -48,6 +48,9 @@ namespace DigitalData.Core.Infrastructure
 
                 // 3. register db set factories (can overwrite)
                 RegsDbSetFactory.InvokeAll(services);
+
+                // 4. register repository
+                RegsRepository.InvokeAll(services);
             }
 
             internal RepositoryConfiguration() { }