docs(options): README tables reconciled + permanent option-docs check (item 6a)

Slice (a) of the docs review: 9 undocumented nomarchy.* options got
README rows or inline .leaf mentions (autoTimezone, camera IR-hide,
intel.guc, amd.pstate/vaapi, package, system.stateFile, restic.paths).
The diff is now a flake check: option names are eval-walked from the
four option-declaring modules (config halves stay lazy) and compared
to the tables by tools/check-option-docs.py — undocumented options and
stale table rows both fail. Negative-tested against the pre-fix README
(reports exactly the 9 gaps). Item 6 split into slices a–d in BACKLOG.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

agent/BACKLOG.md

@@ -22,19 +22,21 @@ next, in what order*.
 
 ## NOW
 
-*Items 21–27: real-hardware QA findings from the Latitude 5410
-(Bernardo, 2026-07-04) — bugs found on metal outrank the queue.*
-
-### 6. Full docs review & restructure
-ROADMAP § Full docs review. The roadmap/backlog split is done (this
-file); remaining: reconcile every README option table against the live
-`nomarchy.*` surface; drift pass over docs/OVERRIDES.md, docs/TESTING.md,
-templates/downstream/README.md; read the install/first-run story end to
-end; add a short **recovery runbook** (desktop won't start → boot an
-older generation / `nomarchy-snapshots` / greetd journal — the pieces
-exist, the story isn't written). Site-vs-markdown is a Decision (below).
-**Verify:** V0 + a mechanical option-surface diff (eval the options,
-compare to the tables — consider making that a permanent check).
+### 6. Full docs review & restructure — sliced, one slice per iteration
+ROADMAP § Full docs review. Done: the roadmap/backlog split (this file);
+slice (a) option-surface reconcile — README tables fixed (9 gaps) and
+the diff made permanent as the `option-docs` flake check (eval-walked
+surface vs tables, catches stale rows too). Remaining slices:
+- **(b) drift pass** over docs/OVERRIDES.md, docs/TESTING.md,
+  templates/downstream/README.md — read each against the current tree,
+  fix what lies.
+- **(c) install/first-run story** read end to end (README install §§ +
+  template README as one narrative; fix the seams).
+- **(d) recovery runbook** — short doc: desktop won't start → boot an
+  older generation / `nomarchy-snapshots` / greetd journal. The pieces
+  exist, the story isn't written.
+Site-vs-markdown is a Decision (below). **Verify:** V0 per slice; (b)/(c)
+against the live tree, not memory.
 
 ## NEXT