Backfilled retro entries lack main_green/hermes_clean fields (survivorship bias). Now rates are computed only from measured entries. LOOPSTAT shows "no data yet" instead of fake 100%. Co-authored-by: Kimi Agent <kimi@timmy.local> Reviewed-on: http://localhost:3000/rockachopa/Timmy-time-dashboard/pulls/189 Co-authored-by: hermes <hermes@timmy.local> Co-committed-by: hermes <hermes@timmy.local>