days: add Addresses table with map pins to every day file

Stays, stops and parking pullouts with coordinates from OpenStreetMap,
each linked to Google Maps. Plan lines keep only the map link on the
place name. README and itinerary mention the section.

Claude-Session: https://claude.ai/code/session_0143dpDbP48SioBZZJ4iTf5c

days/2026-10-04.md

@@ -4,3 +4,9 @@
 
 - Return [SIXT rental](../bookings/transport/car-rental.md) early at SFO ~4:30 PM (booked through Oct 5, 1 PM — update return time in the SIXT account first)
 - UA8073 / AC573 SFO → YVR **7:30 PM** ([flights](../bookings/transport/flights-ms.md)) · Air Canada check-in · return bag fee at check-in
+
+## Addresses
+
+| Place | Address | Map |
+|---|---|---|
+| SFO Rental Car Center (SIXT) | 780 N McDonnell Rd, San Francisco, CA 94128 | [37.62813, -122.40025](https://www.google.com/maps/search/?api=1&query=37.62813,-122.40025) |