Vi 865 user audit logger (#20577)

* Removes Sidekiq Enterprise and Pro dependencies

Removes enterprise-specific Sidekiq gems and their dependencies (einhorn, gserver) to simplify the application's job processing infrastructure and reduce external dependencies.

* Adds UserAuditLogger service and specs

This commit introduces a new UserAuditLogger service for tracking user actions
and their verification statuses. The implementation includes:

The UserAuditLogger provides functionality to:
- Log user actions with verification status
- Support custom status messages
- Handle missing verification cases
- Maintain consistent logging format

Files changed:
- app/services/user_audit_logger.rb
- spec/services/user_audit_logger_spec.rb
- .github/CODEOWNERS

* Removes trailing whitespace from Ruby files

* refactor(user-audit-logger): Convert to service object pattern

- Convert to instance class with initialize/perform pattern
- Accept verification objects directly instead of user objects
- Remove default status, require explicit status value
- Add validations for required fields
- Use config hash to fix parameter list length
- Pass UserActionEvent object instead of ID

The UserAuditLogger now follows service object conventions and has
stricter parameter requirements for better reliability.

* Use implicit arguments and consistent naming

* refactor: simplify UserAuditLogger specs and improve initialization

- Replace config hash with explicit keyword arguments in UserAuditLogger initialization
- Move status to a top-level let declaration for better test organization
- Update error message for subject verification to be more precise
- Update missing parameter test to match Ruby's actual ArgumentError message
- Remove redundant logger initialization in specs

* refactor: improve UserAuditLogger initialization and specs

- Update UserAuditLogger to use explicit keyword arguments

Co-authored-by: bramleyjl

* revert: remove Gemfile.lock changes

The Gemfile.lock changes were unintentionally included in commit 1255301.
These changes should be handled separately.

* revert: remove Gemfile.lock changes

The Gemfile.lock changes were unintentionally included in commit 1255301.
These changes should be handled separately.

* improve UserAuditLogger parameter handling

- Keep explicit parameters in initialize for better code clarity
- Add inline rubocop disable for ParameterLists
- Update error message for subject verification
- Use implicit hash syntax consistently
- Remove redundant status testing
- Remove unnecessary config variable

The initialize method intentionally keeps all parameters explicit to make
it clear what the class requires, with a rubocop disable comment to
acknowledge the parameter count.

* Improves Rubocop directive placement

.github/CODEOWNERS

@@ -469,6 +469,7 @@ app/services/mhv_logging_service.rb @department-of-veterans-affairs/octo-identit
 app/services/rapid_ready_for_decision @department-of-veterans-affairs/Disability-Experience @department-of-veterans-affairs/va-api-engineers @department-of-veterans-affairs/backend-review-group
 app/services/sign_in @department-of-veterans-affairs/octo-identity
 app/services/terms_of_use @department-of-veterans-affairs/octo-identity
+app/services/user_audit_logger.rb @department-of-veterans-affairs/octo-identity
 app/services/users @department-of-veterans-affairs/octo-identity
 app/swagger/readme.md @department-of-veterans-affairs/va-api-engineers @department-of-veterans-affairs/backend-review-group
 app/swagger/swagger/requests/appeals @department-of-veterans-affairs/backend-review-group
@@ -1885,6 +1886,7 @@ spec/services/mhv_logging_service_spec.rb @department-of-veterans-affairs/octo-i
 spec/services/rapid_ready_for_decision @department-of-veterans-affairs/Disability-Experience @department-of-veterans-affairs/va-api-engineers @department-of-veterans-affairs/backend-review-group
 spec/services/sign_in @department-of-veterans-affairs/octo-identity
 spec/services/terms_of_use @department-of-veterans-affairs/octo-identity
+spec/services/user_audit_logger_spec.rb @department-of-veterans-affairs/octo-identity
 spec/services/users @department-of-veterans-affairs/octo-identity
 spec/simplecov_helper.rb @department-of-veterans-affairs/va-api-engineers @department-of-veterans-affairs/backend-review-group
 spec/spec_helper.rb @department-of-veterans-affairs/va-api-engineers @department-of-veterans-affairs/backend-review-group

app/services/user_audit_logger.rb

@@ -0,0 +1,59 @@
+# frozen_string_literal: true
+
+class UserAuditLogger
+  class Error < StandardError; end
+  class MissingSubjectVerificationError < Error; end
+  class MissingUserActionEventError < Error; end
+  class MissingStatusError < Error; end
+
+  attr_reader :user_action_event, :acting_user_verification, :subject_user_verification,
+              :status, :acting_ip_address, :acting_user_agent
+
+  # rubocop:disable Metrics/ParameterLists
+  def initialize(user_action_event:, acting_user_verification:, subject_user_verification:,
+                 status:, acting_ip_address:, acting_user_agent:)
+    @user_action_event = user_action_event
+    @acting_user_verification = acting_user_verification
+    @subject_user_verification = subject_user_verification
+    @status = status
+    @acting_ip_address = acting_ip_address
+    @acting_user_agent = acting_user_agent
+  end
+  # rubocop:enable Metrics/ParameterLists
+
+  def perform
+    validate_required_fields
+    create_user_action
+  end
+
+  private
+
+  def validate_required_fields
+    validate_user_action_event
+    validate_subject_verification
+    validate_status
+  end
+
+  def validate_user_action_event
+    raise MissingUserActionEventError, 'User action event must be present' if user_action_event.nil?
+  end
+
+  def validate_subject_verification
+    raise MissingSubjectVerificationError, 'Subject user verification must be present' if subject_user_verification.nil?
+  end
+
+  def validate_status
+    raise MissingStatusError, 'Status must be present' if status.nil?
+  end
+
+  def create_user_action
+    UserAction.create!(
+      user_action_event:,
+      acting_user_verification:,
+      subject_user_verification:,
+      status:,
+      acting_ip_address:,
+      acting_user_agent:
+    )
+  end
+end

spec/services/user_audit_logger_spec.rb

@@ -0,0 +1,82 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe UserAuditLogger do
+  describe '#perform' do
+    let(:user_action_event) { create(:user_action_event) }
+    let(:acting_user_verification) { create(:user_verification) }
+    let(:subject_user_verification) { create(:user_verification) }
+    let(:acting_ip_address) { Faker::Internet.ip_v4_address }
+    let(:acting_user_agent) { Faker::Internet.user_agent }
+    let(:status) { :initial }
+    let(:logger) do
+      described_class.new(
+        user_action_event:,
+        acting_user_verification:,
+        subject_user_verification:,
+        status:,
+        acting_ip_address:,
+        acting_user_agent:
+      )
+    end
+
+    it 'creates a user action record' do
+      expect { logger.perform }.to change(UserAction, :count).by(1)
+
+      user_action = UserAction.last
+      expect(user_action).to have_attributes(
+        user_action_event: user_action_event,
+        acting_user_verification: acting_user_verification,
+        subject_user_verification: subject_user_verification,
+        status: 'initial',
+        acting_ip_address: acting_ip_address,
+        acting_user_agent: acting_user_agent
+      )
+    end
+
+    context 'when user_action_event is nil' do
+      let(:user_action_event) { nil }
+
+      it 'raises a missing user action event error' do
+        expect { logger.perform }.to raise_error(
+          UserAuditLogger::MissingUserActionEventError,
+          'User action event must be present'
+        )
+      end
+    end
+
+    context 'when subject_user_verification is nil' do
+      let(:subject_user_verification) { nil }
+
+      it 'raises a missing verification error' do
+        expect { logger.perform }.to raise_error(
+          UserAuditLogger::MissingSubjectVerificationError,
+          'Subject user verification must be present'
+        )
+      end
+    end
+
+    context 'when status is nil' do
+      let(:status) { nil }
+
+      it 'raises a missing status error' do
+        expect { logger.perform }.to raise_error(
+          UserAuditLogger::MissingStatusError,
+          'Status must be present'
+        )
+      end
+    end
+
+    context 'when required parameter is not provided' do
+      it 'raises an argument error' do
+        expect do
+          described_class.new(
+            user_action_event:,
+            subject_user_verification:
+          )
+        end.to raise_error(ArgumentError, /missing keywords: :acting_user_verification/)
+      end
+    end
+  end
+end