- New host-metrics native stack: one telegraf container per host, pushes CPU/memory/disk/network/load/processes/swap to a user-specified InfluxDB 1.x endpoint
- `HOST_TAG` overrides the kernel hostname for the host tag; `COLLECT_ZFS=true` enables `inputs.zfs` (pool health + ARC stats)
- Offline shell tests cover marker substitution and required-env validation; no telegraf binary needed to run them
prathamesh0