perf(billing,settlement): paginate claims and wallet transactions (H9, H10)

GET /billing/claims loaded every tenant claim with no limit. Add
findByTenant(page, limit) + countByTenant (shared query builder), default
limit 50 / max 100, and expose totals as data.meta — kept inside the existing
{ data: { data: [...] } } envelope so current clients are unaffected.

GET /wallet/transactions was already bounded (findByUser defaulted to limit 50)
but page-less; add page/offset + countByUser + the same additive meta.

Regression: tests/Billing/ClaimsListPaginationTest,
tests/Settlement/WalletTransactionsPaginationTest.

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

src/Billing/Repository/ClaimRepository.php

@@ -22,14 +22,31 @@ class ClaimRepository extends ServiceEntityRepository
      * @param array{status?:?string, insurance_id?:?int, from?:?int, to?:?int, q?:?string} $filters
      * @return Claim[]
      */
-    public function findByTenant(string $entityType, int $entityId, array $filters = []): array
+    public function findByTenant(string $entityType, int $entityId, array $filters = [], int $page = 1, int $limit = 50): array
+    {
+        return $this->tenantQb($entityType, $entityId, $filters)
+            ->orderBy('c.id', 'DESC')
+            ->setFirstResult(($page - 1) * $limit)
+            ->setMaxResults($limit)
+            ->getQuery()
+            ->getResult();
+    }
+
+    public function countByTenant(string $entityType, int $entityId, array $filters = []): int
+    {
+        return (int) $this->tenantQb($entityType, $entityId, $filters)
+            ->select('COUNT(c.id)')
+            ->getQuery()
+            ->getSingleScalarResult();
+    }
+
+    private function tenantQb(string $entityType, int $entityId, array $filters): \Doctrine\ORM\QueryBuilder
     {
         $qb = $this->createQueryBuilder('c')
             ->where('c.entityType = :type')
             ->andWhere('c.entityId = :id')
             ->setParameter('type', $entityType)
-            ->setParameter('id', $entityId)
-            ->orderBy('c.id', 'DESC');
+            ->setParameter('id', $entityId);
 
         if (!empty($filters['status'])) {
             $qb->andWhere('c.status = :status')->setParameter('status', $filters['status']);
@@ -61,7 +78,7 @@ class ClaimRepository extends ServiceEntityRepository
             )->setParameter('q', '%' . $q . '%');
         }
 
-        return $qb->getQuery()->getResult();
+        return $qb;
     }
 
     /**