merge: bring Horseshoe Las Vegas booking from gh/master

Resolve against the bookings/{stays,transport} layout, couple payer
names, and the days/ timeline: move hotel-vegas-horseshoe.md into
bookings/stays/, swap the Wyndham ledger row for Horseshoe US$1,067.70
(KTVT, shared 50/50; settlement now US$715.37), and point Sep 30–Oct 3
day files at the Horseshoe.

Claude-Session: https://claude.ai/code/session_01SQPbfX7jyTALGYxJw36hbT

bookings/stays/wyndham-desert-rose-las-vegas.md

@@ -1,5 +1,7 @@
 # Wyndham Desert Rose Resort — Las Vegas
 
+> ❌ **CANCELLED — Sep 9, 2026, free of charge.** Booking.com reported on Sep 2 that the card couldn't be processed; on Sep 5 the property asked to cancel for non-payment, and the cancellation was confirmed Sep 9 (no charge). Replaced by [Horseshoe Las Vegas](hotel-vegas-horseshoe.md). The details below are kept for history.
+
 **Wyndham Desert Rose Resort 2BR Apartment with Resort Access**
 
 | | |
@@ -11,7 +13,7 @@
 | **Units** | 1 apartment |
 | **Guests** | 4 adults |
 | **Guest name** | Konstantin Tursunov (KT) |
-| **Cost** | US$630 (approximately CHF 509 when booked) |
+| **Cost** | US$630 (approximately CHF 509 when booked) — **not charged; booking cancelled** |
 | **Payment** | Total-price prepayment may be charged at any time; property charges in USD |
 | **Confirmation** | 5522.291.696 |
 | **PIN** | 4018 |