Nightly benchmark regression on 2025.05.01

### Description

I'm seeing a big performance change (mostly regression) on 2025.05.01 benchmark, without an annotation. There are many [commits diff](https://github.com/apache/lucene/compare/612f0da4a4ce3a133b40402a87ec5cf7eeb290cc...c15f3c4602dbc1533e68a745c0c0e2be495d75e8) for this run, i have not managed to identify but maybe someone has the context.

https://benchmarks.mikemccandless.com/2025.05.01.10.59.59.html

Start with the 2025.05.01 benchmark report and compare the commits in the linked 612f0da4...c15f3c46 range. Review the benchmark changes to identify the source and context of the regression; done means the performance change is explained and the missing annotation is supplied.

Written by the indexing model from the issue text.