chore: init commit

in worker.../repo/GITFOLDER.zip is the .git folder.

worker-toolkit-stocks-in-the-future/repo/app/models/teacher.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+class Teacher < User
+  attr_accessor :school_id
+
+  has_many :teacher_classrooms, dependent: :destroy
+  has_many :classrooms, through: :teacher_classrooms
+
+  before_validation :sync_username_from_email
+
+  def display_name
+    name.presence || email&.split("@")&.first || "Teacher"
+  end
+
+  private
+
+  def sync_username_from_email
+    self.username = email if email.present?
+  end
+end