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