Sub-ticket of EVO-27 applog-listen venus rail: burst-dedup for opaque client errors (Script error. / Failed to fetch) — N same-UA+session within 60s → 1 alert+count; isolated 1-offs → log-only. pm-venus amend 2026-06-22 (mars cross-app: Samsung Internet crash-loop found in this class). Supersedes blanket log-only. · evolutiva