fix(#150): added before?/1 clauses to the three transformers for SetRelationshipSource (#151)

Each `AddStructure` transformer will execute before the
`Ash.Resource.Transformers.SetRelationshipSource`.

Author: simpers

lib/account/transformers/add_structure.ex

@@ -8,6 +8,7 @@ defmodule AshDoubleEntry.Account.Transformers.AddStructure do
   use Spark.Dsl.Transformer
   import Spark.Dsl.Builder
 
+  def before?(Ash.Resource.Transformers.SetRelationshipSource), do: true
   def before?(Ash.Resource.Transformers.BelongsToAttribute), do: true
   def before?(Ash.Resource.Transformers.CachePrimaryKey), do: true
   def before?(_), do: false

lib/balance/transformers/add_structure.ex

@@ -9,6 +9,7 @@ defmodule AshDoubleEntry.Balance.Transformers.AddStructure do
   import Spark.Dsl.Builder
   import Ash.Expr
 
+  def before?(Ash.Resource.Transformers.SetRelationshipSource), do: true
   def before?(Ash.Resource.Transformers.CachePrimaryKey), do: true
   def before?(Ash.Resource.Transformers.BelongsToAttribute), do: true
   def before?(_), do: false

lib/transfer/transformers/add_structure.ex

@@ -7,6 +7,7 @@ defmodule AshDoubleEntry.Transfer.Transformers.AddStructure do
   @moduledoc false
   use Spark.Dsl.Transformer
 
+  def before?(Ash.Resource.Transformers.SetRelationshipSource), do: true
   def before?(Ash.Resource.Transformers.CachePrimaryKey), do: true
   def before?(Ash.Resource.Transformers.BelongsToSourceField), do: true
   def before?(Ash.Resource.Transformers.BelongsToAttribute), do: true