Implements AuditEventSubscriber that subscribes to all 9 security-relevant
EventType members and persists redacted audit entries via AuditService.record().
Key components:
- AuditEventSubscriber: bridges EventBus and AuditService (SEC7)
- SECURITY_EVENT_MAP: maps EventType enum to audit type strings
- Redaction via redact_dict() on event details before persistence
- Graceful error handling: failures logged, never propagated
Post-review fixes applied:
- BUG-1: Remove dead correlation_id null-check guard (DomainEvent.correlation_id
is always non-None via ULID default_factory)
- SEC-2: Redact exception messages in warning logs via redact_value() to prevent
potential leakage of sensitive internal state (e.g. DB connection strings)
- PERF-3: Pre-generate unique DomainEvent instances in ASV benchmark setup to
avoid skew from reusing a single frozen object
- Wire event_bus from the DI container into CorrectionService (plan.py),
ConfigService (config.py, skill.py x2, server.py), and
PersistentSessionService (session.py) at their CLI construction sites.
Closes#581