Add missing migrations for good_job 4x (#967)

* Goodjob 3.99

* Properly bump to good_job 4.0.0

* Remove accidently tracked .tool-versions

db/migrate/20240709152243_create_good_job_execution_duration.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+class CreateGoodJobExecutionDuration < ActiveRecord::Migration[7.2]
+  def change
+    reversible do |dir|
+      dir.up do
+        # Ensure this incremental update migration is idempotent
+        # with monolithic install migration.
+        return if connection.column_exists?(:good_job_executions, :duration)
+      end
+    end
+
+    add_column :good_job_executions, :duration, :interval
+  end
+end