Repo tidy: logs consolidated, 15/16 scripts tracked, docs synced (#615/#611/#603)

Run outputs moved to logs/ (incl. sda partition-table backup). New from
the 15:57-16:03 parallel session: 16-grow-root-online.sh (RAN: / = 431G
online, swap removed by design — GROW-ROOT-RUNBOOK superseded) and
15-docker-to-data2.sh (staged, not run). README/NEXT/RUNBOOK/REBUILD
reflect current reality. Moot rdp-testprep timer removed from the VM.

Details: https://projects.knownelement.com/issues/615

RUNBOOK-TODAY.md

@@ -7,9 +7,9 @@ updated: repo moved ~/optimize → ~/projects/ultix.
 **Remaining perf actions (as of 2026-09-01):**
 1. Net multiqueue — DONE + verified 2026-09-01 morning (bounce
    22:51->22:53; `ethtool -l` ens18 4/4, ens19 2/2).
-2. Root growth 279G → ~505G — fully manual, step-by-step with checks:
-   `~/projects/ultix/GROW-ROOT-RUNBOOK.md` (#603). No script runs it; you
-   type every command yourself.
+2. ~~Root growth~~ DONE ONLINE 2026-09-01 16:03 by a parallel crush
+   session: `16-grow-root-online.sh` — / is 431G, swap removed by design,
+   no reboot needed (sfdisk backup in logs/ + /root/). #603 satisfied.
 3. Rebuild-from-scratch path documented: REBUILD.md + docs/state
    snapshots (regen: 14-capture-state.sh) — #615.