fix(pm-api-latency): cohort to 5 native venues + venue dimension#725
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Root cause: rank_matrix_query + uptime panels matched any venue label present in pmapi_* metrics — codex, codex-polymarket, codex-kalshi, predexon-*, mobula crept in via the pm-rate-limits harness scraping the same gauges. The leaderboard mixed real venues with paid relays and broken probes (success<70%), and surfaced bogus /products/<slug> pages. Fix: - Pin venue=~"polymarket|kalshi|limitless|manifold|myriad" on rank_matrix_query + uptime_24h/7d/30d + cold_connect_p50 panels. - Add dimension.venue so each native venue gets its own sub-leaderboard alongside the per-region tabs (Polymarket × us-east, etc.), matching the original PM cluster design.
This was referenced Jun 25, 2026
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Two issues fixed:
1. Cohort pollution: rank_matrix_query and the uptime panels matched any venue label present in pmapi_* metrics. The pm-rate-limits harness scrapes the same gauges for codex, codex-polymarket, codex-kalshi, predexon-*, mobula → leaderboard mixed native venues with paid relays and broken probes (success<70%). It also surfaced /products/ pages for these junk slugs (codex-polymarket, predexon-kalshi, etc.) with successful HTTP 200.
Fix: pin
venue=~"polymarket|kalshi|limitless|manifold|myriad"on rank_matrix_query and on every uptime/cold-connect panel. Once the matrix excludes these slugs, /products/* pages for them stop having any benchmark appearance and 404 cleanly.2. No per-venue dimension: original PM cluster design called for sub-pages per venue via dimension.venue, mirroring dimension.region. Added it.
Requires worker Railway redeploy after merge so the snapshot picks up the new spec.