Canonical 18-mer containment for checking barcoded Delftia Nanopore library assignments v1

Compare each barcoded read set against three study assemblies. On MinION flow cell FAZ36592, the run-level header sample_id=BAA-396R was shared across barcodes. This procedure checked whether barcode07 and barcode08 resembled previously assigned D. tsuruhatensis ATCC BAA-554 libraries. It uses archived sequence files and Python 3.9 or later (tested with 3.9.6). The containment calculation uses only the Python standard library.