FROSTYVERSE H2-088 — RUN THIS FIRST

Goal: test whether ONE universal two-body mass-handling formulation can be used for both Sun/planet and planet/moon precession without retuning the frozen FV 2D+4D closure.

Run:
  run_H2-088.bat

Return first:
  h2-088results.txt

The test set is intentionally small:
  Sun+Mercury, Sun+Venus, Sun+Icarus, Earth+Moon, Jupiter+Europa.

Three identical-for-all-systems lanes are compared:
  1) SOURCE_ONLY_LEGACY
  2) PAIR_TOTAL_EVERYWHERE, using GM_pair = G(M1+M2)
  3) SPLIT_SOURCE_FIELD_PAIR_ORBIT, using M1 for field/clock depth and M1+M2 for relative orbital motion.

No system receives a special coefficient or special Moon-only formula.
