ADR-015: stop shipping one site's values, and make the rule a gate

The scanner has been reporting the same count for weeks, which is what a rule
that only prints becomes. It now FAILS the build, and it looks where the leaks
actually were: PowerShell, the installer, the seeds, generated JSON, the
frontend - case-insensitively, across plugins, shopdb, scripts, deploy, tools.
A line that is deliberate declares itself with an ADR-015-OK marker and a
reason, so the claim is visible in review instead of tolerated in silence.

What it found, fixed here:

- The shadow client wrote one site's ShopDB URL into HKLM whenever the registry
  disagreed. At the site it was written for that reads as healing drift;
  anywhere else it overwrites the site's own address on every enforce cycle,
  and the site cannot win because the cycle repeats. The bay's value now wins,
  an explicit -BaseUrl seeds it, and with neither there is nothing honest to
  write, so it says so and skips.
- The kiosk dispatcher fell back to one plant's host when HKLM was unset, so a
  kiosk elsewhere quietly opened a server it has no business reaching. The
  fallback is now this site's site_base_url, baked in at seed time, and the
  dispatcher refuses rather than guessing when neither is set. Its legacy
  shortcut matcher derives the host from that URL instead of naming one.
- The OpenAPI generator hardcoded a production hostname into every spec it
  generated, which then published to a public wiki. The relative mount is the
  only server it can honestly name; a site passes its own by environment.
- Placeholders and examples in the UI and the client help offered real internal
  subnets and a real production URL. They now use documentation ranges.

Both publication gates - the export scrub and the docs publishability test -
carry the site patterns, which neither did. One plant's hostname, FQDN and
internal networks are out of the documentation and the generated specs.

Comments naming the reference site are reworded rather than deleted: the
reasoning is worth keeping, the plant name is not what makes it true.

frontend/src/utils/siteSettings.js

@@ -119,7 +119,7 @@ export async function getServicenowUrls() {
 
 // Printer hostname template. {ip} is replaced with the dash-separated IP.
 export async function getPrinterHostnameTemplate() {
-  return getSetting('printer_hostname_template', 'Printer-{ip}.printer.geaerospace.net')
+  return getSetting('printer_hostname_template', 'Printer-{ip}.printer.geaerospace.net')  // ADR-015-OK: GE Aerospace-wide domain, and only the DEFAULT of a documented setting every site can override.
 }
 
 // Email domain appended to a contact SSO to build email/Teams links

frontend/src/views/SetupWizard.vue

@@ -19,7 +19,7 @@
           <p class="hint">Used for the dashboard header and QR / absolute links.</p>
           <div class="form-group">
             <label>Facility name</label>
-            <input v-model="form.facility_name" type="text" class="form-control" placeholder="West Jefferson" />
+            <input v-model="form.facility_name" type="text" class="form-control" placeholder="Main Plant" />
           </div>
           <div class="form-group">
             <label>Site base URL <span class="hint">(blank = use the browsing origin)</span></label>

frontend/src/views/settings/EmailSettings.vue

@@ -143,7 +143,7 @@
               <input
                 type="text"
                 v-model="settings.site_base_url"
-                placeholder="https://tsgwp00525.wjs.geaerospace.net/ops"
+                placeholder="https://shopdb.example.net/ops"
                 @blur="saveSetting('site_base_url', settings.site_base_url)"
                 :disabled="saving"
               >

frontend/src/views/settings/SiteSettings.vue

@@ -113,7 +113,7 @@ const HELP = {
   usb_directory_mode: 'Where USB checkout data lives: selfhosted (tables in this app) or external (a separate cmmc_usb database via CMMC_USB_DB_* environment variables).',
   setup_complete: 'Set automatically when the first-run setup wizard finishes. Turning it off sends admins back to the /setup wizard on next login.',
   employeeid_pattern: 'Regular expression that a scanned/typed employee ID must match to be recognized. Default: ^\\d{9}$ (9 digits). An invalid regex is ignored and the default is used.',
-  printer_hostname_template: 'Template for generating printer hostnames from an IP. Use {ip} where the dash-separated IP goes. Example: Printer-{ip}.printer.geaerospace.net',
+  printer_hostname_template: 'Template for generating printer hostnames from an IP. Use {ip} where the dash-separated IP goes. Example: Printer-{ip}.printer.geaerospace.net',  // ADR-015-OK: GE Aerospace-wide domain, and only the DEFAULT of a documented setting every site can override.
   contact_email_domain: 'Email domain appended to a support contact SSO to build email (sso@domain) and Microsoft Teams chat links. Example: geaerospace.com. Leave blank to hide the contact action buttons.',
   dualpath_single_machine: 'Treat a Dualpath pair (a dual-bay machine with one controller) as a single machine in lists, counts, and the floor map. Both bay records are always kept; detail pages stay per-bay with a sibling banner. Enter true or false. Default: true.',
   site_timezone: 'IANA timezone for this site. Notification start/end times are shown and entered in this zone, and daily-reset notification expiry is computed here. Default: America/New_York.'