Intermittent AuTest failure: slice_prefetch (cache.log does not match gold)

[moonchen]

The slice_prefetch gold test (tests/gold_tests/pluginTest/slice/slice_prefetch.test.py) is flaky on CI: the slice plugin issues its prefetch requests in the background, and their Content-Range / X-Cache results are logged to cache.log. Because those prefetch requests are asynchronous, the contents and ordering of cache.log are timing-dependent and intermittently do not match gold/slice_prefetch.gold. It passes on re-run with no code change.

Test : Checking that ReturnCode == None - Failed
   Process: ts: Failed
     file .../ts/log/cache.log : Checking that .../cache.log matches gold/slice_prefetch.gold - Failed

[krusta07]

Flaky async tests turning green PRs red are always a pain. I'd love to jump into the slice_prefetch test script and update the log verification logic so it checks for the existence of the expected prefetch entries without strictly relying on timing-dependent line order. Mind assigning this to me