Removing attributes for migrations as a library that does this already exists.

Updating a few DTOs for programmatic creation.

src/Umbraco.Core/Models/Rdbms/AppTreeDto.cs

@@ -1,4 +1,5 @@
 using Umbraco.Core.Persistence;
+using Umbraco.Core.Persistence.DatabaseAnnotations;
 
 namespace Umbraco.Core.Models.Rdbms
 {
@@ -8,15 +9,18 @@ namespace Umbraco.Core.Models.Rdbms
     internal class AppTreeDto
     {
         [Column("treeSilent")]
+        [Constraint(Default = "0")]
         public bool Silent { get; set; }
 
         [Column("treeInitialize")]
+        [Constraint(Default = "1")]
         public bool Initialize { get; set; }
 
         [Column("treeSortOrder")]
         public byte SortOrder { get; set; }
 
         [Column("appAlias")]
+        [PrimaryKeyColumn(AutoIncrement = false, Clustered = true, Name = "PK_umbracoAppTree", OnColumns = "[appAlias], [treeAlias]")]
         public string AppAlias { get; set; }
 
         [Column("treeAlias")]
@@ -38,6 +42,7 @@ namespace Umbraco.Core.Models.Rdbms
         public string HandlerType { get; set; }
 
         [Column("action")]
+        [NullSetting(NullSetting = NullSettings.Null)]
         public string Action { get; set; }
     }
 }