feat: include raw tags as tag type labels in allure results

[yhuan123]

Summary

• Allure results 之前只包含从 @allure.label.* 解析出的结构化 labels（如 {name:"case_id", value:"xxx"}）
• 普通 tag（如 @smoke、@api、@tektoncd-chains-basic）在生成结果时被丢弃
• 导致下游 Lynx 入库时 case_tags 为空数组，case_ids 走 fallback 使用 historyId
• 现在将所有场景 tag 同时作为 {name:"tag", value:"@xxx"} 写入 labels，与结构化 labels 共存

Test plan

• go build ./... 编译通过
• 本地运行 BDD 测试验证生成的 allure-result JSON 包含 tag 类型 labels
• 使用修改后的 allure 库重新入库 Lynx，确认 case_tags 和 case_ids 正确填充

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[alaudabot]

🚨 Stale Pull Request Warning

This pull request has been inactive for 35 days.

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• 🔒 Auto-close: After 60 days
• 🗑️ Branch deletion: After 90 days (if not protected)

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