Each date-field event is now plotted on the lane corresponding to the Framework Stage the co-op was in on the field's stored date, resolved from the activity stream's stage transitions. Date_Opened is pinned to Stage 5 as the journey anchor. Events that pre-date any known transition fall back to the field's section rank so they still surface somewhere. Extracts the STAGE_RANK map (previously inline in ReportView) into lib/stageRank.ts alongside the new buildStageRankAtDate resolver factory.
