FLY_PROBE_CATCH=route drives the real PokemonPalette from a checkpoint,
one uniform choice per hold, prints every pad it deals and every refusal
with its reason, and reads the frame the pad comes down to one refusing
button on: which list emptied why, the no-window ledgers, and whether the
route search reaches each way out. FLY_PROBE_SEED_* rebuild the session
ledgers a restore starts empty; FLY_PROBE_RATCHET starts from the
ratchet's rollback snapshot; FLY_PROBE_HOLD presses raw directions first.
PokemonPalette gains inspect(), fences() and a doc(hidden) ledgers_mut()
for the survey. The loop never calls them.