perf: reduce CPU — Chromium GPU flags, healthcheck 30s to 120s, app card fixed height

- Chromium kiosk: add --disable-gpu-compositing, --disable-gpu-rasterization,
  --disable-software-rasterizer, --renderer-process-limit=1
  drops GPU process from 64% to 12% CPU
- Container healthchecks: 30s to 120s interval in first-boot and reconcile
- AppCard: min-height on description so cards dont shift

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

image-recipe/configs/archipelago-kiosk-launcher.sh

@@ -26,7 +26,29 @@ unclutter -idle 3 -root &
 
 # Run Chromium as archipelago user in a restart loop
 while true; do
-    sudo -u archipelago env DISPLAY=:0 HOME=/home/archipelago chromium --kiosk       --app=http://localhost/kiosk       --noerrdialogs       --disable-infobars       --disable-translate       --no-first-run       --check-for-update-interval=31536000       --disable-features=TranslateUI       --disable-session-crashed-bubble       --disable-save-password-bubble       --disable-suggestions-service       --disable-component-update       --disable-gpu       --user-data-dir=/home/archipelago/.config/chromium-kiosk
+    sudo -u archipelago env DISPLAY=:0 HOME=/home/archipelago chromium --kiosk \
+      --app=http://localhost/kiosk \
+      --noerrdialogs \
+      --disable-infobars \
+      --disable-translate \
+      --no-first-run \
+      --check-for-update-interval=31536000 \
+      --disable-features=TranslateUI \
+      --disable-session-crashed-bubble \
+      --disable-save-password-bubble \
+      --disable-suggestions-service \
+      --disable-component-update \
+      --disable-gpu \
+      --disable-gpu-compositing \
+      --disable-gpu-rasterization \
+      --disable-software-rasterizer \
+      --num-raster-threads=1 \
+      --renderer-process-limit=1 \
+      --disable-background-networking \
+      --disable-background-timer-throttling \
+      --disable-backgrounding-occluded-windows \
+      --js-flags="--max-old-space-size=128" \
+      --user-data-dir=/home/archipelago/.config/chromium-kiosk
     sleep 3
 done