geo: add block extract, boundary verification, and the carried-over reference set

Inventory the sibling security-game project and copy only the evidence: nine
licensed photos with their sidecar provenance into Art/reference/hollywood/,
now LFS-tracked. Add the block-wide OSM extract with a manifest, resolve the
demo bounds (Orange Dr -118.341434 .. Highland Ave -118.338718, 279 m) and the
south/north building sets, and add Geo/scripts/block_report.py to reproduce it.

The sibling docs place the El Capitan Theatre west of 6840; OSM geometry and
the house numbering put it east. Recorded with the two unresolved measurement
conflicts rather than averaged.

Docs/licensing.md

@@ -23,8 +23,8 @@ Licensing is tracked in four separate layers. Do not merge them; each has differ
 - **Code licence.** MIT is proposed: short, compatible with the assets' separate terms, and no copyleft spill onto art. Decide before publishing the repository.
 - **Documentation licence.** Default to the code licence unless a reason appears to separate them.
 - **ODbL posture.** Decide whether distributed builds contain a derived geographic database (a modified OSM extract) or only rendered geometry. The answer changes the share-alike obligations for the shipped product. Record the decision here and in the release notes.
-- **Reference photography retention.** The El Capitan reference set is CC BY / CC BY-SA / public domain and currently lives in a sibling project. If it is copied here, carry the per-file attribution and the CC BY-SA review note with it.
+- **Reference photography retention.** Decided 2026-11-06: the El Capitan reference set is committed under `Art/reference/hollywood/` with its `SIDECAR.md` provenance carried over verbatim, because every file is CC0, public domain, CC BY, or CC BY-SA and none is shipped. The CC BY-SA review note travels with the set. Re-check before any material is derived from a frame.
 
 ## Provenance sources
 
-Primary record: [THIRD_PARTY_NOTICES.md](../THIRD_PARTY_NOTICES.md). The sibling project at `…/06-games/security-game/docs/screens/refs/hollywood/SIDECAR.md` holds the per-file provenance for the El Capitan block reference photographs and must be carried over verbatim if those files are reused.
+Primary record: [THIRD_PARTY_NOTICES.md](../THIRD_PARTY_NOTICES.md). The sibling project at `…/06-games/security-game/docs/screens/refs/hollywood/SIDECAR.md` holds the original per-file provenance for the El Capitan block photographs; a verbatim copy now lives at `Art/reference/hollywood/SIDECAR.md`.