fix: reduce sudo/journald log volume from periodic collectors (#124) - #125
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closes #124
Reduces the number of sudo/journald log entries generated by the periodic ZFS collectors without changing behavior or security model:
Defaults:easyzfs !pam_session, !log_allowed). Failed attempts still log.ZpoolCollector: add TTL caches for stable pool properties (autotrim,checkpoint,compressratio) and forzpool status -t.EASYZFS_ZPOOL_INTERVAL(default 60 s) to control the collector tick interval.install.sh.Validated on citadel-01 and citadel-02: healthz OK, pools/datasets/snapshots populate, and
journalctl -g 'easyzfs :'goes from thousands of entries/day to near zero.