Change to static skin catalog population

BlueLaminate/BlueLaminate.EFCore/Configurations/CollectionConfiguration.cs

@@ -0,0 +1,14 @@
+using BlueLaminate.EFCore.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace BlueLaminate.EFCore.Configurations;
+
+public class CollectionConfiguration : IEntityTypeConfiguration<Collection>
+{
+    public void Configure(EntityTypeBuilder<Collection> entity)
+    {
+        // Slug is the natural key the sync upserts against.
+        entity.HasIndex(e => e.Slug).IsUnique();
+    }
+}