feat(setup): operator-tested relay pulse, signed into the ledger

Add a per-relay "Test" control on each saved controller in /setup so an admin
can prove barrier wiring without a vehicle. POST /api/setup/test-relay pulses a
barrier relay — but because a physical open with no matching signed command is
the fraud signal, the route SIGNS a barrier_open_command (reason setup.relayTest,
source manual, attributed to the acting admin) BEFORE it fires. Reconciliation
then reads the open as explained, not an anomaly, and there's an audit trail.

- Admin-only (site:update), CSRF-guarded; fires only against a SAVED controller
  (real id → clean attribution; also stops a redirected/unsaved config from
  opening an arbitrary host's barrier). Sign-before-fire; a pulse failure is
  reported, not a 500. radarAlert relays (lamps) are excluded from the UI.
- New reason code setup.relayTest in @parking/shared (+ EN template); sq/en keys.
- EventLog constructed before setupRoutes so the route can sign.
- Integration test (stub controller, no hardware): RBAC 403, CSRF 403, signed
  barrier_open_command on success, 400 unknown relay w/ no ledger row, 404
  unknown controller, 400 bad relay value.

Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V

apps/web/src/lib/i18n/en.ts

@@ -470,6 +470,13 @@ export const en: Catalog = {
       "Sends a test slip to the printer now. ‘Connected’ only opens the link — this confirms the printer actually feeds paper.",
     printOk: "✓ Test slip sent ({{ms}} ms). Check the printer.",
     "printFail.print-failed": "The printer rejected the job (out of paper, cover open, or the link dropped).",
+    // Relay wiring test — physically opens the barrier (the open is signed into the ledger).
+    testRelay: "Test R{{relay}}",
+    relayTesting: "Opening…",
+    testRelayTitle: "Pulse relay {{relay}} — opens the barrier",
+    confirmRelayTest: "Pulse relay {{relay}} now? This physically opens the barrier and is recorded in the ledger as a test.",
+    relayTestOk: "✓ R{{relay}} pulsed — barrier opened",
+    relayTestFailed: "✗ R{{relay}} failed: {{detail}}",
     // Reveal/hide toggle for a secret field (e.g. the device web password).
     revealSecret: "Show password",
     hideSecret: "Hide password",