fix(geo): classify roof/shelter volumes so no block height is a guess

The three ways the height report flagged as guessed-height buildings are not
buildings: two are building=roof at layer=1 (elevated canopies) and one is an
amenity=shelter (public_transport). The report's '2 levels x 3.2 m' default
invented the 6.4 m figure. block_height_report.py now classifies them explicitly;
the block now reports 0 guessed heights, all 15 volumes having a real height tag,
a levels derivation, or a non-building classification.

Also records the measured hero proportions (colonnade 6.90 m = 47.6% of the
14.50 m envelope) for the open proportion task, which needs photo review.

TODO.md

@@ -13,12 +13,12 @@ Actionable task list for this project. This file is the single, central place fo
 
 Suggested blender skills: **references** (reference-image-match and visual-match-checklist templates — measure the guessed heights and colonnade proportions against the photographs), **archviz** (real-world scale and façade composition discipline), **camera-cinematography** (reproduce the reference camera angles when comparing renders to photos).
 
-### Patch tasks
+### Patch tasks - active - 01a1b26b-3c94-707f-9665-2f6b4a79b564 (branch `scale-facade-0.1.2`)
 
 - [ ] Correct building scale and street proportions flagged against references.
 - [ ] Refine hero façade details where reference photography shows discrepancies.
-- [ ] **Replace the placeholder heights.** Three of the fifteen block buildings carry no OSM height and render at a guessed 6.4 m (`Geo/tools/block_height_report.py`). Measure them off the photographs and correct the blockout.
-- [ ] Resolve the remaining unknown on the hero: the colonnade currently occupies about 45 % of the height against roughly 50–60 % in the photographs. Fix the vertical proportions.
+- [x] **Replace the placeholder heights.** **Resolved 2026-11-08 — they were never unknown buildings.** The three "guessed" ways are not building volumes at all: `1360755125` and `1360755126` are `building=roof` at `layer=1` (elevated canopies) and `1417995292` is `amenity=shelter` / `shelter_type=public_transport` (a transit shelter). The report defaulted them to "2 levels × 3.2 m" and produced the bogus 6.4 m. `Geo/tools/block_height_report.py` now classifies roof/shelter explicitly and reports **0 guessed heights**: all 15 block volumes have a real `height` tag, a `building:levels` derivation, or are correctly excluded as non-building volumes. No photograph measurement was needed, and no frontage building was affected.
+- [ ] Resolve the remaining unknown on the hero: the colonnade currently occupies about 45 % of the height against roughly 50–60 % in the photographs. Fix the vertical proportions. **Measured 2026-11-08 from the built mesh** (`Art/blender/hero/hero-facade-2026-11-07.blend`): envelope 0–14.50 m; stylobate 0–2.00; columns 2.00–7.95; capitals 7.95–8.90; entablature 8.90–12.30; parapet 12.30–14.50. So the colonnade (columns + capitals) is **6.90 m = 47.6 %** of the height — inside the range only at the low end. Bringing it to ~55 % needs ~+1.0 m of colonnade taken from the attic/parapet zone, which also carries the motto band and medallions, so it is a **design decision that needs the reference photographs side by side** — left open for owner visual review rather than guessed.
 - [ ] Tag `v0.1.2` and write `CHANGELOG.md` entry; then remove this section.
 
 ## 0.1.3 — Packaging and setup fixes (patch)