Add online property and live video URL to lecture models, as well as a default value at the course level

db/migrate/20240204140917_add_default_live_video_url_to_course.rb

@@ -0,0 +1,5 @@
+class AddDefaultLiveVideoUrlToCourse < ActiveRecord::Migration[7.1]
+  def change
+    add_column :courses, :default_live_video_url, :string
+  end
+end

db/migrate/20240204141120_add_online_and_live_video_url_to_lecture.rb

@@ -0,0 +1,6 @@
+class AddOnlineAndLiveVideoUrlToLecture < ActiveRecord::Migration[7.1]
+  def change
+    add_column :lectures, :online, :boolean, default: false, null: false
+    add_column :lectures, :live_video_url, :string
+  end
+end