The profile-routing file handler keeps a static snapshot of the served
profile homes taken at startup. When 'hermes profile delete' removes a
home underneath a long-lived dashboard process, every record for that
home retries the vanished logs/ path: the managed rotating handler
stats, reopens, fails with FileNotFoundError and routes the error to
stderr — a repeating '--- Logging error ---' loop every logging tick
(#103777).
Fall back to the default home when a routed home's directory no longer
exists, mirroring the cron scheduler's _existing_profile_homes() filter.
The deleted profile's directory is never resurrected on disk and its
records keep flowing to the default home instead of being dropped with
stderr noise.
(cherry picked from commit deab9df17ffd896a61d02f7e25b897d6e2aa46ba)
d2ebd0606e