refactor(pay): 调整请求头构建逻辑

- 将 RequestHeaderBuilder trait 移至 AbstractRepo 中
- 删除 AccountBalanceRepo 中的重复 trait 引用
- 此改动简化了代码结构，避免了重复代码

src/Infrastructure/Repository/AbstractRepo.php

@@ -15,10 +15,14 @@ use GuzzleHttp\RequestOptions;
 use Singularity\HDK\Core\Http\RequestService;
 use Singularity\HDK\Core\Http\RequestServiceFactory;
 
+use Singularity\HDK\Pay\Trait\RequestHeaderBuilder;
+
 use function Hyperf\Config\config;
 
 abstract class AbstractRepo
 {
+    use RequestHeaderBuilder;
+
     protected RequestService $requestService;
 
     public function __construct(?string $baseUrl = null)

src/Infrastructure/Repository/AccountBalanceRepo.php

@@ -16,12 +16,9 @@ use Singularity\HDK\Pay\Domain\Account\Aggregate\AccountBalance;
 use Singularity\HDK\Pay\Domain\Account\Aggregate\ValueObject\PointsBalance;
 use Singularity\HDK\Pay\Domain\Account\Enum\PointType;
 use Singularity\HDK\Pay\Domain\Account\Repository\AccountRepoInterface;
-use Singularity\HDK\Pay\Trait\RequestHeaderBuilder;
 
 final class AccountBalanceRepo extends AbstractRepo implements AccountRepoInterface
 {
-    use RequestHeaderBuilder;
-
     public function getAccount(string $uid): AccountBalance
     {
         $response = $this->requestService->requestGet(