The largest over bodies of the root orbit's offset from the origin, every orbit Distance
along the chain, and the body's Roche limit: a static bound on where any body can be,
computed once at construction and independent of Pack.Radius. Presenters read it.
Builds; the Unity side follows in the next commit.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>