style(program): add UsedImplicitly attribute

Add JetBrains.Annotations and mark the partial Program class with [UsedImplicitly] to suppress static-analysis/IDE false positives for the runtime-used entry point.

Author: sfmskywalker

src/Elsa.Catalog.Api/Program.cs

@@ -16,6 +16,7 @@
 using Elsa.Catalog.Packaging.NuGet;
 using Elsa.Catalog.Persistence.EntityFrameworkCore;
 using Elsa.PackageManifests.Validation;
+using JetBrains.Annotations;
 using Microsoft.AspNetCore.Authentication;
 using Microsoft.EntityFrameworkCore;
 
@@ -83,4 +84,5 @@
 
 app.Run();
 
+[UsedImplicitly]
 public partial class Program;