Restructure the Polar vitals sync from a single Promise.all over the five
collections into a Promise.allSettled over a per-collection spec, each closure
fetching and mapping so a throwing mapper is contained exactly like a failing
fetch. The healthy collections import; a failing one is recorded once as a
partial failure that names it, without stamping success and without rethrowing,
so a single unavailable data type — SpO2 on a watch without the sensor, a
higher-tier cardio-load read an account lacks — stops blanking recharge, sleep,
and activity on every tick.
A 401 is now a per-collection failure classified reauth_required, not a
whole-leg throw; the write-path escape still surfaces unmarked for the poll
boundary to record once. Mirrors the shipped Oura isolation, minus the
token-refresh leg Polar has no path for.
Marc-André Bombeck
4574155ce6