fix ots_server crash if id is not valid input for stoull
fix ots_server crash if id is not valid input for stoull

htgt/CRISPR-Analyser,htgt/CRISPR-Analyser,htgt/CRISPR-Analyser,htgt/CRISPR-Analyser,htgt/CRISPR-Analyser,htgt/CRISPR-Analyser,htgt/CRISPR-Analyser,htgt/CRISPR-Analyser,htgt/CRISPR-Analyser