vp2fuiheadAdded the dual-write window diagram and embedded it in the decision it explainsunknown · 2026-08-21 05:13 UTC1 note + 1 filegb6hs6Third capture: comparison job clean for a day, cutover done, old columns still standingunknown · 2026-08-21 05:11 UTC1 note1k04h8Second capture: the backfill failed against live traffic and was replacedunknown · 2026-08-21 05:11 UTC1 note99icjlgenesisFirst capture: why the migration was split, and what the cutover had to preserveunknown · 2026-08-21 05:11 UTC5 notes + the overview