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Temporal enrichment skips tombstones and revives older dimension values · case 04

Temporal enrichment skips tombstones and revives older dimension values.

Member previewVariant 4 · 3 implementations · 7 checks per implementation

Case contract

Enrich facts [id,key,event-time] from versioned dimension rows [key,valid-from,revision,payload,tombstone]. For matching non-null key, use the greatest (valid-from,revision) no later than fact time. A selected tombstone yields None and blocks fallback to older versions. Emit [fact-id,payload-or-None].

Why this case matters

A bounded deterministic data engine model makes representation and changelog faults reproducible.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
tombstone blocks old	`[[10, "old"]]`	`[[10, null]]`	Failed

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