docs(agent): correct #76 V3 scope — dev box isn't a Nomarchy install

The dev box runs Bernardo's own NixOS (TuringMachine, 25.11), not
Nomarchy — so hibernating it tests that config's hibernate, not
Nomarchy's oom.nix/patch-template/rofi wiring, and can't close #76's V3.
Its layout (LUKS cryptroot + btrfs @ + /swap/swapfile + resume_offset)
does resume, which corroborates the MIGRATION.md runbook, but nothing
more. Rescope the two #76 HARDWARE-QUEUE entries to require a machine
actually running Nomarchy (a Latitude install, or the dev box after
migration), and fix the matching reference in the BACKLOG #76 stub.

Verification: V0 (docs/agent-notes only).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

agent/BACKLOG.md

@@ -30,9 +30,10 @@ in [`docs/ROADMAP.md`](../docs/ROADMAP.md); map in
 
 ### 76. Hibernation default — all agent work shipped `[blocked:hw]`
 Hibernation + zram on by default (product intent, Bernardo 2026-07-10).
-**All V0/V1/V2 slices done** (2026-07-10); only the V3 laptop check remains
-(HARDWARE-QUEUE → "AMD dev box"). Design record in **ROADMAP § Hibernation +
-zram by default**. Shipped:
+**All V0/V1/V2 slices done** (2026-07-10); only the V3 check remains — on a
+machine **actually running Nomarchy** (the dev box runs Bernardo's own NixOS,
+not Nomarchy, so it can't close it). Steps in HARDWARE-QUEUE. Design record in
+**ROADMAP § Hibernation + zram by default**. Shipped:
 - zram default (`modules/nixos/oom.nix`, zstd/50%/prio 100) — `checks.zram-swap`.
 - Installer/template already default new installs to a RAM-sized encrypted
   `@swap` swapfile + `resume_offset` wiring; `swapSize=0` = no-swap opt-out.