Implement Comprehensive Audit Logging & Compliance Reporting

[akargi]

Overview

Create a comprehensive audit logging system that captures all system activities, user actions, and data changes with immutable records for compliance, security investigation, and regulatory reporting.

Description

Regulatory compliance and security investigations require detailed audit trails of all system activities. This module provides immutable logging, searchable audit records, and compliance report generation.

Requirements

• Immutable audit log storage with append-only design
• Capture all user actions: logins, trades, settings changes, admin actions
• System event logging: API calls, errors, data migrations
• Data change tracking with before/after values
• Audit log search and filtering by user, action, date range, resource
• Compliance report generation (transaction reports, user activity, admin actions)
• Retention policies with archival to cold storage
• Real-time audit dashboard for security team
• Integration with security incident response
• GDPR compliance features (data export, deletion tracking)

Acceptance Criteria

• Audit log entity created with append-only storage
• Global interceptor captures all API requests/responses
• GET /api/audit/logs returns paginated audit records with filtering
• Audit logs include: timestamp, user, action, resource, before/after state
• Search functionality filters by user, action type, date range, resource type
• POST /api/audit/reports generates compliance reports in PDF/CSV
• Immutability: audit logs cannot be deleted or modified (only appended)
• Retention policy: logs kept for minimum 7 years per compliance
• Unit tests for audit capture logic (>80% coverage)
• E2E tests validate audit trail completeness
• Performance: audit logging adds <5ms latency to requests
• Real-time dashboard shows last 100 activities