SCANNER_PROBE_RE drift: de-dupe venus's two copies against pluto vector corpus

venus applog-pull SCANNER_PROBE_RE de-duplication: venus held TWO copies that had drifted (54/68 vs 42/68 against pluto's shared vector corpus). Fix de-duped into one dependency-free module, byte-identical then behaviourally identical for request path over 3710 paths, strict superset for pull. Cross-repo handoff from PLUTO-661 (blocked since 2026-08-01 for want of a venus lane).