Add missing files from P1-040/P1-041 implementation:
- CheckoutRateLimitException for 429 responses when rate limit exceeded
- FraudAssessment data object for fraud scoring results
- FraudService for velocity checks and Stripe Radar integration
- Register services in Boot.php
- Add fraud detection configuration in config.php
- Add CouponServiceTest for input sanitisation
The CheckoutRateLimiter (already tracked) is now properly integrated with
the exception handling, and the FraudService provides defence-in-depth
with velocity-based and geo-anomaly detection.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
P1-040: Verified rate limiting already integrated in checkout flow
P1-041: Integrated FraudService into checkout and webhook handlers
P1-042: Added coupon code sanitisation in CouponService
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Align commerce module with the monorepo module structure by updating
all namespaces to use the Core\Mod\Commerce convention. This change
supports the recent monorepo separation and ensures consistency with
other modules.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
