feat: Audit log APIs (#6434)

- Adds the appropriate APIs for Audit Logs.

ref: #6015

db/migrate/20230202132107_install_audited.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+class InstallAudited < ActiveRecord::Migration[6.1]
+  # rubocop:disable RMetrics/MethodLength
+  def self.up
+    create_table :audits, :force => true do |t|
+      t.bigint :auditable_id
+      t.string :auditable_type
+      t.bigint :associated_id
+      t.string :associated_type
+      t.bigint :user_id
+      t.string :user_type
+      t.string :username
+      t.string :action
+      t.jsonb :audited_changes
+      t.integer :version, :integer, :default => 0
+      t.string :comment
+      t.string :remote_address
+      t.string :request_uuid
+      t.datetime :created_at
+    end
+    # rubocop:enable RMetrics/MethodLength
+
+    add_index :audits, [:auditable_type, :auditable_id, :version], :name => 'auditable_index'
+    add_index :audits, [:associated_type, :associated_id], :name => 'associated_index'
+    add_index :audits, [:user_id, :user_type], :name => 'user_index'
+    add_index :audits, :request_uuid
+    add_index :audits, :created_at
+  end
+
+  def self.down
+    drop_table :audits
+  end
+end

db/schema.rb

@@ -153,6 +153,28 @@ ActiveRecord::Schema.define(version: 2023_02_24_124632) do
     t.index ["message_id"], name: "index_attachments_on_message_id"
   end
 
+  create_table 'audits', force: :cascade do |t|
+    t.bigint 'auditable_id'
+    t.string 'auditable_type'
+    t.bigint 'associated_id'
+    t.string 'associated_type'
+    t.bigint 'user_id'
+    t.string 'user_type'
+    t.string 'username'
+    t.string 'action'
+    t.jsonb 'audited_changes'
+    t.integer 'version', default: 0
+    t.string 'comment'
+    t.string 'remote_address'
+    t.string 'request_uuid'
+    t.datetime 'created_at'
+    t.index %w[associated_type associated_id], name: 'associated_index'
+    t.index %w[auditable_type auditable_id version], name: 'auditable_index'
+    t.index ['created_at'], name: 'index_audits_on_created_at'
+    t.index ['request_uuid'], name: 'index_audits_on_request_uuid'
+    t.index %w[user_id user_type], name: 'user_index'
+  end
+
   create_table "automation_rules", force: :cascade do |t|
     t.bigint "account_id", null: false
     t.string "name", null: false