Status: IN
The dedup registry retains entries for 2× the allowed lateness, ensuring late-arriving duplicates are still caught even after their aggregation window has been finalized by the watermark — the dedup horizon intentionally exceeds the processing horizon.
The 2× multiplier ensures dedup coverage extends beyond the point where corrections would be impossible
Depends on (SL): dedup-pruning-uses-2x-lateness, watermark-drives-finalization