feat(perf): Cache labels on the conversation model (#8527)

db/migrate/20231211010807_add_cached_labels_list.rb

@@ -0,0 +1,19 @@
+class AddCachedLabelsList < ActiveRecord::Migration[7.0]
+  def change
+    add_column :conversations, :cached_label_list, :string
+    Conversation.reset_column_information
+    ActsAsTaggableOn::Taggable::Cache.included(Conversation)
+
+    update_exisiting_conversations
+  end
+
+  private
+
+  def update_exisiting_conversations
+    ::Account.find_in_batches do |account_batch|
+      account_batch.each do |account|
+        Migration::ConversationCacheLabelJob.perform_later(account)
+      end
+    end
+  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[7.0].define(version: 2023_12_01_014644) do
+ActiveRecord::Schema[7.0].define(version: 2023_12_11_010807) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_stat_statements"
   enable_extension "pg_trgm"
@@ -453,6 +453,7 @@ ActiveRecord::Schema[7.0].define(version: 2023_12_01_014644) do
     t.integer "priority"
     t.bigint "sla_policy_id"
     t.datetime "waiting_since"
+    t.string "cached_label_list"
     t.index ["account_id", "display_id"], name: "index_conversations_on_account_id_and_display_id", unique: true
     t.index ["account_id", "id"], name: "index_conversations_on_id_and_account_id"
     t.index ["account_id", "inbox_id", "status", "assignee_id"], name: "conv_acid_inbid_stat_asgnid_idx"