New enforcer.rs module runs alongside active tests:
- Periodic quota checks (default every 10s, configurable --quota-check-interval)
- Max duration enforcement — forcefully stops test after limit
- User quotas: daily/weekly/monthly checked against DB + current session
- IP quotas: daily/weekly/monthly checked against DB + current session
- Flush session bytes to DB for accurate cross-session tracking
- Sets state.running=false to gracefully terminate on quota breach
StopReason enum tracks why a test was stopped:
MaxDuration, UserDailyQuota, UserWeeklyQuota, UserMonthlyQuota,
IpDailyQuota, IpWeeklyQuota, IpMonthlyQuota, ClientDisconnected
Tests (6 new, all passing):
- test_enforcer_max_duration: stops after max_duration seconds
- test_enforcer_client_disconnect: detects normal client exit
- test_enforcer_user_daily_quota_exceeded: stops when user quota hit
- test_enforcer_ip_daily_quota_exceeded: stops when IP quota hit
- test_enforcer_under_quota_runs_normally: doesn't stop if under limits
- test_enforcer_flush_records_usage: verifies DB persistence
64 total tests (58 standard + 6 enforcer), all passing.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
