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.

ROADMAP.md

@@ -26,17 +26,17 @@ Status detail in [Docs/setup.md](Docs/setup.md); workstation audit in [Docs/envi
 
 ### Geographic data
 
-- [ ] Save a versioned OSM extract; document date, bounds, and source in `Geo/`.
+- [x] Save a versioned OSM extract; document date, bounds, and source in `Geo/`.
 - [ ] Acquire separately licensed elevation data if needed.
 - [ ] In QGIS, set a suitable local projected CRS (e.g. EPSG:26911) and record a local origin.
-- [ ] Verify the address, building footprints, and demo boundaries for 6840 Hollywood Blvd against source data.
+- [x] Verify the address, building footprints, and demo boundaries for 6840 Hollywood Blvd against source data.
 - [ ] Import OSM blockouts through Blosm; clean and detail them in Blender.
 - [ ] Preserve geographic coordinates in metadata; define explicit meter→centimeter conversion to local Unreal coordinates.
 
 ### Asset production
 
 - [ ] Establish a consistent scale test, named export presets, and repeatable import settings.
-- [ ] Collect licensed reference photography for manual façade work.
+- [-] Collect licensed reference photography for manual façade work.
 - [ ] Model hero façade for the El Capitan Entertainment Centre site.
 - [ ] Model surrounding block frontage.
 - [ ] Model simplified background buildings directly across Hollywood Boulevard.