db optimizations around names and case-sensitivity (#2749)

* generate (case-insensitive) unique names for fields that should be unique

* move name case-insensitivity down to schema level

* update changelog

ErsatzTV.Infrastructure/Data/Configurations/Metadata/ShowMetadataConfiguration.cs

@@ -10,6 +10,8 @@ public class ShowMetadataConfiguration : IEntityTypeConfiguration<ShowMetadata>
     {
         builder.ToTable("ShowMetadata");
 
+        builder.HasIndex(sm => sm.Title);
+
         builder.HasMany(sm => sm.Artwork)
             .WithOne()
             .OnDelete(DeleteBehavior.Cascade);