chore: Add event for conversations transferred to Bot (#2167)

* chore:  Event for conversation transferred to Bot

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Nithin David <webofnithin@gmail.com>

db/migrate/20210426191914_migration_remove_locked_from_conversation.rb

@@ -0,0 +1,5 @@
+class MigrationRemoveLockedFromConversation < ActiveRecord::Migration[6.0]
+  def change
+    remove_column :conversations, :locked, :boolean
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2021_03_15_101919) do
+ActiveRecord::Schema.define(version: 2021_04_26_191914) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_stat_statements"
@@ -229,7 +229,6 @@ ActiveRecord::Schema.define(version: 2021_03_15_101919) do
     t.integer "display_id", null: false
     t.datetime "contact_last_seen_at"
     t.datetime "agent_last_seen_at"
-    t.boolean "locked", default: false
     t.jsonb "additional_attributes", default: {}
     t.bigint "contact_inbox_id"
     t.uuid "uuid", default: -> { "gen_random_uuid()" }, null: false

db/seeds.rb

@@ -31,7 +31,7 @@ unless Rails.env.production?
   inbox = Inbox.create!(channel: web_widget, account: account, name: 'Acme Support')
   InboxMember.create!(user: user, inbox: inbox)
 
-  contact = Contact.create!(name: 'jane', email: 'jane@example.com', phone_number: '0000', account: account)
+  contact = Contact.create!(name: 'jane', email: 'jane@example.com', phone_number: '+2320000', account: account)
   contact_inbox = ContactInbox.create!(inbox: inbox, contact: contact, source_id: user.id, hmac_verified: true)
   conversation = Conversation.create!(
     account: account,