n.toString(radix) passed the radix as a dyn value, so every call boxed a
number and converted it back, and kept scr_json.c's dyn machinery linked
into programs that use nothing else of it.
A number-typed radix now calls scr_num_to_string_radix_f64, which
truncates it as ToIntegerOrInfinity does and holds the formatting that
moved from scr_json.c to scr_lib.c. Other radix types keep the generic
entry point, which converts and then calls the same function.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
