when the homeserver rejects the token (stale session after state wipe or
expiry), the daemon now deletes the token file + matrix-sdk state dir
and exits cleanly instead of crash-looping.
hive-c0re's matrix::ensure_all sweep now runs periodically every 30
minutes (in addition to startup) so deleted token files get
re-provisioned without requiring a hive-c0re restart. the systemd.paths
watcher on the token file path then restarts the daemon with a fresh
token.
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