Complete Payment module: initiate/webhook/confirm/refund actions, Filament resources (T5.8-T5.13)

- InitiatePaymentAction + POST /api/v1/payments/{booking}/initiate
- Generic KBZ webhook (POST /api/v1/webhooks/{method}/{encryptBookingId?}),
  signature verification per KBZ's real callback spec, PaymentGatewayInterface::handleWebhook()
- ConfirmPaymentAction: idempotent confirmation, PaymentCompleted/PaymentFailed events,
  MarkBookingPaid listener
- RefundBookingAction + POST /api/v1/bookings/{booking}/refund: partial refunds validated
  against remaining balance, RefundProcessed event, MarkBookingRefunded listener
- CancelBookingAction now refunds confirmed bookings instead of rejecting; BookingPolicy::cancel
  requires process_refunds for confirmed bookings
- PaymentPlugin + PaymentResource/RefundResource Filament admin UI (read-only payments,
  refund list + Process action)
- Booking detail page now shows related payments
- Fix CACHE_STORE mismatch (database -> redis) so tagged route caching works
- CLAUDE.md: never run migrate:fresh/migrate:refresh/db:wipe on dev without being asked

app-modules/booking/src/Http/Controllers/BookingController.php

@@ -88,11 +88,11 @@ class BookingController extends Controller
             ->setStatusCode(201);
     }
 
-    public function cancel(Booking $booking): BookingResource
+    public function cancel(Request $request, Booking $booking): BookingResource
     {
         Gate::authorize('cancel', $booking);
 
-        $this->cancelBookingAction->handle($booking);
+        $this->cancelBookingAction->handle($booking, $request->user()?->id);
 
         return new BookingResource($booking->load(self::EAGER_LOADS));
     }