fix(wallet-service): 添加验证码验证调试日志并修复布尔值比较

- 添加完整响应数据日志以便调试
- 使用严格比较 === true 代替 ?? false

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/services/wallet-service/src/infrastructure/external/identity/identity-client.service.ts

@@ -150,7 +150,8 @@ export class IdentityClientService {
         },
       );
 
-      const valid = response.data?.valid ?? false;
+      this.logger.log(`提取短信验证码响应: userId=${userId}, status=${response.status}, data=${JSON.stringify(response.data)}`);
+      const valid = response.data?.valid === true;
       this.logger.log(`提取短信验证码验证结果: userId=${userId}, valid=${valid}`);
 
       return valid;