immich-frame: use 24-hour clock (ClockFormat HH:mm)

Viktor asked to switch the Immich photo-frame shown on the Portal
kitchen appliance to a 24-hour clock. immichFrame defaults ClockFormat
to 'hh:mm' (12-hour) and we never overrode it, so the frame was showing
12-hour time. Set ClockFormat: "HH:mm" (date-fns 24h token) in the
frame Settings.yml ConfigMap; Reloader restarts the pod on apply.

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

stacks/immich/frame.tf

@@ -21,6 +21,7 @@ resource "kubernetes_config_map" "mailserver_config" {
         ImageZoom: true
         ShowAlbumName: false
         ShowProgressBar: false
+        ClockFormat: "HH:mm"
         WeatherApiKey: ${data.vault_kv_secret_v2.secrets.data["frame_weather_api_key"]}
         UnitSystem: metric
         WeatherLatLong: "51.5074,-0.1278"