Top: a hyper-thread wears its core's temperature, and the columns line up

The process table carries each logical CPU's core id from sysfs topology; a row with
no reading still has the temperature cells, so the % column is one column.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

PLAN.md

@@ -331,7 +331,7 @@ something long in one, switch away and back, refresh — it's all still there.
   the top, not a partition: the scan covers every filesystem the disk backs — its partitions'
   mountpoints, and for a disk in a ZFS pool every mounted dataset of the pool (any of `tank`'s
   eight disks shows `tank`). The walk runs as a helper process, `hamlab space-walk <roots>`,
-  as root through `priv` when the host allows (so `/var/lib/docker` and `/root` count), 16
+  as root through `priv` when the host allows (so `/var/lib/docker` and `/root` count), 32
   workers reading directories depth-first, never crossing a filesystem boundary by itself;
   each root is grafted into one tree at its path. Files under 128 KiB are not kept one by one
   but summed per folder as "N smaller files" — what keeps a scan of millions of files to tens