feat(payment): add GET /api/v1/my/payments for the logged-in user

Add PaymentRepository::findByUser/countByUser and a paginated
my/payments endpoint that returns the authenticated user's own payments
(derived from the token, never a userId in the URL). Public dashboard's
transactions tab can now list payments instead of hitting a nonexistent
route.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/Payment/Controller/PaymentController.php

@@ -518,6 +518,23 @@ class PaymentController extends BaseController
         ]);
     }
 
+    #[IsGranted('IS_AUTHENTICATED_FULLY')]
+    #[Route('/api/v1/my/payments', methods: ['GET'])]
+    public function myPayments(Request $request, #[CurrentUser] User $user): JsonResponse
+    {
+        $page   = max(1, (int) $request->query->get('page', 1));
+        $limit  = min(100, max(1, (int) $request->query->get('limit', 20)));
+        $status = $request->query->get('status');
+
+        $items = array_map(
+            fn(Payment $p) => $p->toArray(),
+            $this->paymentRepo->findByUser($user, $status, $page, $limit)
+        );
+        $total = $this->paymentRepo->countByUser($user, $status);
+
+        return $this->paginated($items, $total, $page, $limit);
+    }
+
     #[IsGranted('IS_AUTHENTICATED_FULLY')]
     #[Route('/api/v1/payment/{uuid}', methods: ['GET'])]
     public function getStatus(string $uuid, #[CurrentUser] User $user): JsonResponse