An unmapped Google `exerciseType` resolves to the literal "other", and
until now that was the end of the label: nothing else carried it, so a
workout Google typed as a sport the map does not know became
indistinguishable from a genuine `OTHER_WORKOUT`. Carry the trimmed
upstream value through `GoogleHealthMappedWorkout.sportTypeRaw` and write
it to `Workout.metadata.googleExerciseType`, the shape Polar, Strava and
WHOOP already use. Insert and update share one payload, so a full sync
repairs rows written by an older build.
The comment above the type map claimed an unmapped type "still persists"
because the column is free-text. It does not, and it did not when the
comment was written. Prose that asserts what the code does not do is the
same defect as the missing write, so correct it here rather than later.
Marc-André Bombeck