feat(subs): print an advisory "out-of-window" slip at early entry

A subscriber entering outside their plan's window owes a deferred charge, but
nothing printed — they had no paper proof a fee was pending. Print a best-effort
ADVISORY slip at entry ("PARKIM — JASHTË ORARIT"): holder, entry time, "entered
out-of-window (window opens HH:MM)", and the key line "⚠ fee computed at exit"
+ the occurrence number. It is NOT a payable ticket and carries NO amount — the
total is computed at the booth on settlement, combining early-entry AND any
late-exit time into one number (windowOwedBetween over the whole stay).

Best-effort like the Z-report / subscription card: printed AFTER the barrier
opens and fully swallowed, so a missing/failed printer never blocks entry. New
printWindowChargeNotice (booth-print.ts) via the generic printReport; wired into
the subscription entry flow when an out-of-window entry charge applies.

(The "both charges at the booth" requirement was already satisfied by the
windowOwedBetween fix — verified: early-entry + late-exit minutes combine in one
calc at lookup/exit. This commit only adds the entry paper trail.) Build+lint 12/12.

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

apps/server/src/booth-print.ts

@@ -1,5 +1,6 @@
 import { eq, ledgerEvents, siteConfig, type Db } from "@parking/db";
 import {
+  formatStampSq,
   printWithFailover,
   registry,
   type PrinterDevice,
@@ -154,3 +155,38 @@ export async function printSubscriptionCard(
   logger.info(`subscription card ${card.code} printed on ${printedBy}`);
   return printedBy;
 }
+
+/**
+ * Print an ADVISORY "out-of-window" slip when a subscriber enters (or exits) outside
+ * their plan's allowed hours. It is NOT a payable ticket and carries NO final amount —
+ * the total is computed at the booth on settlement (early-entry AND any late-exit time
+ * combined). It just gives the subscriber paper proof that a fee is pending against this
+ * occurrence. Albanian (like every customer-facing slip — see i18n.md). Best-effort:
+ * the caller swallows failures so a missing printer never blocks the barrier.
+ */
+export async function printWindowChargeNotice(
+  db: Db,
+  notice: { occurrenceId: string; holderName?: string | null; at: string; windowOpensMin?: number; edge: "entry" | "exit" },
+  logger: FastifyBaseLogger,
+): Promise<string> {
+  const printers = loadPrinters(db);
+  const hhmm = (m?: number) =>
+    m == null ? "" : `${String(Math.floor(m / 60)).padStart(2, "0")}:${String(m % 60).padStart(2, "0")}`;
+  const lines = [
+    `Abonent: ${notice.holderName || "-"}`,
+    `${notice.edge === "entry" ? "Hyrje" : "Dalje"}: ${formatStampSq(notice.at)}`,
+    notice.edge === "entry"
+      ? `Ka hyrë jashtë orarit${notice.windowOpensMin != null ? ` (orari hap ${hhmm(notice.windowOpensMin)})` : ""}`
+      : "Ka dalë jashtë orarit",
+    "",
+    "⚠ Detyrim do të llogaritet në dalje",
+    "   (paguhet në kabinë para se të dilni)",
+    "",
+    `Nr: ${notice.occurrenceId}`,
+  ];
+  const printedBy = await printWithFailover(printers, "booth-receipt", (d: PrinterDevice) =>
+    d.printReport({ title: "PARKIM — JASHTË ORARIT", lines }),
+  );
+  logger.info(`out-of-window notice printed for ${notice.occurrenceId} on ${printedBy}`);
+  return printedBy;
+}