Fixed-crash regression seeds

Inputs that once crashed a fuzz harness and now must not. Re-run after changes:

./build-fuzz/fuzz/fuzz_dinodata fuzz/crashes-fixed/

dinodata-shape-overflow — a .dinodata header whose shape dims multiply to an enormous element count; the loader used to vector::resize it and throw std::length_error. Fixed by an overflow-checked element-count cap in trellis2_load_dinodata.