H-106 inherits the exact dependency/physics chain from H-105/H-104.

New code is optimization-only:
  h106_missing_local_orientation_feature_audit.py

Frozen physics:
  p = 0
  H-089 WALL_CONTINUOUS
  sqrt(current-cell convergence) * sin(theta)^3
  K = 8.6816265415871847e-05
  current active FrostCell only
  no GR/planetary labels in compact-model training, selection, or transit

H-106 optimization change:
  replace H-105's partial angular feature list with symmetry-complete local
  orientation coordinates a=x^2/r^2 and d=(y^2/r^2-z^2/r^2)^2.
  R65 is diagnostic history only and is not used by the H-106 executable.
