Add the first licensed Hollywood reference board

docs/hollywood-boulevard-map.md

@@ -66,6 +66,10 @@ not texture or geometry sources.
 
 ## References
 
+The committed, license-cleared photo board for this block — with the provenance sidecar and the
+decisions each photo informed — is in
+[`screens/refs/hollywood/README.md`](screens/refs/hollywood/README.md).
+
 - [Hollywood Masonic Temple — Wikipedia](https://en.wikipedia.org/wiki/Hollywood_Masonic_Temple)
 - [El Capitan Entertainment Centre — OpenStreetMap way 424024147](https://www.openstreetmap.org/way/424024147)
 - [El Capitan Theatre — OpenStreetMap way 424024148](https://www.openstreetmap.org/way/424024148)