one entry per table touched, in the order they were processed
sum of rows across every non skipped table
how many targets were skipped, for any reason => each table's reason says which
Schema & table names that were passed over because this DAL can't address them
(schema for a whole file, schema.table for one table inside a usable file).
local .db files removed after a successful upward migration
True when a signal stopped the run early.
Everything that happened during a swap.