cppperf evidence

Updated 2026-10-22 Asia/Shanghai.

cx-string-append-unreserved was removed (about 1.09×); the old JSONL is under _removed/. cx-const-by-value and cx-vector-bool were measured on 2026-10-23 and stay hint. The 2026-10-22 corpus verdict does not cover those two slugs. Default stays hint; no escalate to error. Retired rules keep tombstones and their old JSONL under _removed/.