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Produced by our move from raw registry codes to canonical values while loaders migrated — nothing happened to the business on those dates."],"note":"These rows remain stored — they are evidence of our own processing bugs, not something to delete quietly. They are excluded from this view because showing them would report our pipeline changing as though the business had. The write path no longer creates them."},"_basis":"observed_at is when WE saw the change. effective_at is when the source says it happened, and is usually null because registries rarely state it. We do not infer it."},"web_contact":null,"provenance_url":"https://private.rootz.global/api/provenance/CO/19871159936"}