One ordered step of the persisted region-record ladder.
A step is a pure structural rewrite of one stored record. It receives only
the record — never a caller's options, never the store — so a migration can
neither widen a bound nor reach the network, and it must return a record
carrying toVersion's layout.
One ordered step of the persisted region-record ladder.
A step is a pure structural rewrite of one stored record. It receives only the record — never a caller's options, never the store — so a migration can neither widen a bound nor reach the network, and it must return a record carrying
toVersion's layout.