feat(simulation): canonical spatial scale ladder + body_radius_km (T-1077)

First phase of the D-243 re-scale. Adds server/src/atlas/scale.rs as the
single source of truth for the metric containment ladder (voxel 1m -> chunk
64m -> block 128m -> quarter 512m -> district 2048m -> region 204.8km), the
fixed integer addressing (ChunkPos -> DistrictPos -> RegionPos), and the
elastic seam regions_per_equator(R). Compile-time const asserts enforce the
nesting so the rungs cannot silently drift again — the structural fix for the
Q-110 failure mode (three files, three different region sizes).

Wires body_radius_km (D-204) through BodyParams + the reader: the single
body-specific input to the elastic seam.

No behavior change — foundation only. The rename/re-scale of the carrier
(RegionProfile -> DistrictProfile) and on-demand district derivation follow.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

This commit is contained in:

jpmschweitzer

2026-06-14 22:04:50 +02:00

co-authored by

Claude Opus 4.8

parent e39ba89064

commit 38054d4b12

6 changed files with 204 additions and 17 deletions

									
										server/src/atlas/mod.rs
									
		+1
		
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				@@ -21,6 +21,7 @@ pub mod layer_proxy;

				pub mod plugin;

				pub mod region_profile;

				pub mod road_graph;

				pub mod scale;

				pub mod skeleton_gen;

				pub mod source_resolver;

				pub mod subbiome;