run_epcr v1.1.0 — fast seed-and-verify search for large genomes

Seed-and-verify (pigeonhole) fuzzy in-silico PCR: ~160x faster on large
plant/host genomes with byte-identical output. Optional pyahocorasick backend
(str.find fallback), --no-seed flag, 20 Mb contig chunking with de-duplication,
and a read_fasta soft-mask case fix. See CHANGELOG.md for details.