35db9f88de
- Add AuditLog model with append-only design (timestamp, user, action, resource, IP, details, severity) - Add audit_service.py with record/query helpers and SIEM forwarding (Syslog RFC 5424, HTTP/webhook) - Add /api/audit-logs REST endpoints with filtering and pagination - Add /admin/audit-logs viewer UI with real-time filters - Add SIEM config settings (syslog, HTTP for Splunk HEC/Logstash/Grafana Loki) - Add Alembic migration 027_add_audit_logs - Add navigation link in admin menu - Add comprehensive tests (20 tests covering model, service, SIEM, API, view) Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>