Cobbleboost

Fix bug: ● The reflection was looking for relevantPartsByName directly on PosableEntityModel's superclass, but in Cobblemon 1.7.x that field was moved to a separate
PosableModel object, accessed via a posableModel field on the entity model. So the old single-step lookup always failed with NoSuchFieldException.

The fix does a two-step reflection: first it gets the posableModel field from the entity model instance, then it reads relevantPartsByName from that composed
object. It also walks the full class hierarchy instead of only checking one superclass level, and keeps a fallback for older Cobblemon versions where the field lived directly on the model.