Refactor ObjectDto and update PObjectState relationships

Removed ObjStateId and Id from ObjectDto for simplification.
Updated foreign key in PObjectState from ObjStateId to StateId,
and modified TFControls to support nullable collections.
Adjusted WFDBContext configuration for clearer foreign key
relationships and improved maintainability of the database schema.

src/WorkFlow.Infrastructure/WFDBContext.cs

@@ -47,10 +47,9 @@ public class WFDBContext : DbContext, IUserManagerDbContext
         modelBuilder.ConfigureUserManager();
 
         modelBuilder.Entity<PObjectState>()
-            .HasMany(pos => pos.TFControls)
+            .HasMany(objState => objState.TFControls)
             .WithOne()
-            .HasForeignKey(pctf => pctf.ObjStateId)
-            .HasPrincipalKey(pos => pos.Id)
+            .HasForeignKey(control => control.ObjStateId)
             .OnDelete(DeleteBehavior.Cascade);
 
         base.OnModelCreating(modelBuilder);