fix ef shared table warnings (#480)

ErsatzTV.Infrastructure/Data/Configurations/PlayoutConfiguration.cs

@@ -15,7 +15,8 @@ namespace ErsatzTV.Infrastructure.Data.Configurations
                 .HasForeignKey(pi => pi.PlayoutId)
                 .OnDelete(DeleteBehavior.Cascade);
 
-            builder.OwnsOne(c => c.Anchor);
+            builder.OwnsOne(p => p.Anchor);
+            builder.Navigation(p => p.Anchor).IsRequired();
 
             builder.HasMany(p => p.ProgramScheduleAnchors)
                 .WithOne(a => a.Playout)

ErsatzTV.Infrastructure/Data/Configurations/PlayoutProgramScheduleAnchorConfiguration.cs

@@ -10,8 +10,8 @@ namespace ErsatzTV.Infrastructure.Data.Configurations
         {
             builder.ToTable("PlayoutProgramScheduleAnchor");
 
-            builder.OwnsOne(a => a.EnumeratorState)
+            builder.OwnsOne(a => a.EnumeratorState);
-                .WithOwner();
+            builder.Navigation(a => a.EnumeratorState).IsRequired();
 
             builder.HasOne(i => i.Collection)
                 .WithMany()