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Row growth and source age are graded separately: a small side lane adding rows does not make a frozen main source current.","statuses":{"frozen":"main source older than its threshold (row growth may still be positive)","growing":"added at least its 7-day floor","quiet":"flat this week, no weekly floor, still inside its stall window","slow":"added rows, but under its 7-day floor","stalled":"added nothing across its stall window","unknown":"could not be graded; not a clean result"}}