Last I knew, CPython C code is a) regularly scanned by Valgrind and b) Valgrind is somehow informed as to false positives to not report.  But I know none of the details.  So I suggest you look into this and how to not report the same false positives.

I suggest working with the 'main' branch (future 3.11) as nearly all patches are applied there first and backported as appropriate.

Infer is a facebook github project, used by by other big corps and projects, so it may be worthwhile working with if false positives can be suppressed.