Add support open trace viewer from plugin allure-pytest (flow version allure-2.35.1)

We need to add support for opening the Playwright trace viewer directly from Allure reports (version 2.35.1, Flow UI). Currently, traces are attached but not automatically viewable within the Allure Flow interface.

https://github.com/allure-framework/allure2/pull/2964/commits

Acceptance Criteria:

Traces (trace.zip) attached to test results should be openable directly in the Allure Flow UI (v2.35.1).

A button or link should appear in the report to launch the trace viewer.

Ensure compatibility with existing Playwright trace files.

Expected Result:
Users can open Playwright trace viewer seamlessly from Allure Flow reports without leaving the report context.

首先检查链接的 Allure PR 提交以及 allure-pytest 中现有的 trace.zip 附件流程。查看 Allure Flow v2.35.1 如何处理附加的 Playwright traces，然后验证能否从 report 中启动附加 trace 的 Playwright trace viewer，而无需离开 report。

由索引模型根据 Issue 内容生成。