feat(bar): doctor tripwire indicator (LATER item)

nomarchy-doctor-status: silent while nomarchy-doctor exits 0 (or is
absent), so the module only exists when something is actually broken —
then a red warning glyph with the first ✖ lines jq-escaped into the
tooltip; clicking opens the full sheet (nomarchy-menu doctor).
Interval 300s: the health check is real work (unit/disk/git sweeps),
and this is a tripwire, not a monitor. Added to the generated bar
(status group, after battery) and to BOTH summer whole-swap bars
(module list + jsonc block + CSS membership + @red rule) per the
parity rule.

Verified: V0; V1 — template-home builds with the module in config +
CSS, the status script passes bash -n, both summer jsonc still parse;
functional — the self-gate exits silently, and a shimmed failing
doctor yields jq-valid JSON with class "bad" and the ✖ lines in the
tooltip. Live render queued for hardware.

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

agent/BACKLOG.md

@@ -234,9 +234,6 @@ them as composable commands, not dead ends.
 - **Night-light geo mode**: lat/long auto sunset/sunrise (means wlsunset).
 - **Per-theme icon overrides** / more icon packs (ROADMAP § Icon themes).
 - **MIPI/IPU software-ISP camera** support (no-UVC machines).
-- **Doctor Waybar warning**: a self-gating bar indicator fed by
-  `nomarchy-doctor` (shipped 2026-07-04) — appears only when the sheet
-  has a ✖; click opens the sheet.
 - **Auto-timezone Waybar tooltip** showing the detected zone (optional).
 - **VPN exit-node richer display** (country/city) (optional).
 - **NixOS release bump → v2** `[human]`: deliberate, hand-edited, never