- one helper resolves the level-A values for a write; the five writers
call it instead of carrying their own copy of the derivation
- the create schema takes a1 to a5, and a value the user set wins over
the derived one; the batch request shape is untouched
- both arms of both upserts restate the values, so a re-post cannot
leave a stale reading beside a mood that has since changed
- the JSON import derives from the row's own label rather than the
file's score, which is the one place the two can disagree
- correcting an entry's label re-derives pleasantness the way it
re-derives the score; an explicit null takes an answer back
- a round trip through all five writers against real Postgres asserts
the rows agree and that nothing invents the other four values
Marc-André Bombeck
a1c78eceef