fix: return proper data shape when doing a read in a transaction

closes #1410

lib/ash/actions/read/read.ex

@@ -853,7 +853,7 @@ defmodule Ash.Actions.Read do
           |> case do
             {:error, {:error, error}} -> {:error, error}
             {:error, error} -> {:error, error}
-            {:ok, result} -> {:ok, result}
+            {:ok, result} -> result
           end
 
         query.timeout ->

test/actions/read_test.exs

@@ -31,6 +31,10 @@ defmodule Ash.Test.Actions.ReadTest do
     actions do
       default_accept :*
       defaults [:read, :destroy, create: :*, update: :*]
+
+      read :in_transaction do
+        transaction? true
+      end
     end
 
     attributes do
@@ -290,6 +294,12 @@ defmodule Ash.Test.Actions.ReadTest do
     end
   end
 
+  describe "transaction true" do
+    test "with no records, returns an empty set" do
+      assert [] = Ash.read!(Author, action: :in_transaction)
+    end
+  end
+
   describe "Ash.read!/2 with no records" do
     test "returns an empty result" do
       assert [] = Ash.read!(Post)