Method audit

pkg/knowledge/manager.go:862–867

audit 记录审计日志

(action, userID, itemID, details string)

// audit 记录审计日志
func (m *manager) audit(action, userID, itemID, details string) {
	if m.auditStrategy == nil {
		return
	}
	m.auditStrategy.Record(action, userID, itemID, details)
}

// cleanupRoutine 清理协程
func (m *manager) cleanupRoutine(ctx context.Context) {