wordlist_optimize worker called wordlist_subtract_single (rli2.bin), which
requires both files to be lexicographically sorted. splitlen.bin preserves
insertion order, so rli2.bin silently missed duplicates. Switch to
wordlist_subtract (rli.bin), which loads the remove-list into a hash set and
is order-independent. Also add "(comma-separated)" to the input paths prompt.
Update worker tests to patch wordlist_subtract instead of wordlist_subtract_single.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>