feat(hw): #58 nomarchy-detect-hw post-install re-probe CLI

Package the installer’s pure hardware-db probe as nomarchy-detect-hw:
prints suggested hardwareProfile and system.nix snippets (or --raw
protocol lines). Does not rewrite the flake. On PATH via the distro
module; docs/HARDWARE.md §8 updated. Close #58.

Verified: V1 (build + run on AMD laptop with fingerprint/NPU/IR cam).

agent/BACKLOG.md

@@ -77,15 +77,6 @@ last log lines + `nomarchy-doctor` instead of a raw Nix wall. Likely
 home: menu rebuild wrapper and/or control-center path. Cost: medium
 pkgs/menu; V1 + V2 smoke of the failure path (can force a bad eval).
 
-### 58. `nomarchy-detect-hw` CLI (post-install re-probe)
-HARDWARE.md §8. Installer already has pure `nomarchy_detect_hw` stdout
-protocol (MODULE / NOMARCHY / DETAIL). Ship it as a package on PATH that
-prints suggested `hardwareProfile = [ … ]` and `system.nix` snippets
-without reinstalling — closes the template/migration gap and “I swapped
-the Wi‑Fi card.” Does **not** rewrite the flake unless a later `--apply`
-is explicitly designed. Cost: extract script + package + man/README
-pointer; V0–V1.
-
 ## LATER
 
 - **Wallpapers artifact split** (ROADMAP § Faster switches — decided,
@@ -496,7 +487,8 @@ _(User password minimum length = 8 → #54.)_
 
 #### Live ISO discoverability (one durable cue)
 
-_(Live: one always-visible “Install Nomarchy” action → **#57**.)_
+_(Live: one always-visible “Install Nomarchy” action → **#57** ✓ 2026-07-10;
+  V2 pending: live ISO desktop entry smoke.)_
 
 #### Generated config / post-install polish