H-107 inherits the exact dependency/physics chain from H-106/H-105/H-104.

New optimization-only code:
  h107_whole_frostcell_convergence_reconstruction_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/Newton/planetary labels in model training, selection, or compact transit

Optimization change:
  H-106 approximated individual FrostNode displacement values.
  H-107 instead learns the complete current-cell convergence vector derived
  from the exact 8-corner / 12-FrostSegment FrostCell geometry, then supplies
  that state directly to the unchanged frozen steering algebra.

Holdout discipline:
  train R20/R24/R32; select R40 cell states only; blind R80.
  R65/R70 diagnostics are not loaded or used for fitting.
