FiberHMM 2.16.5

Patch release clarifying DAF-seq usage and packaging the previously tagged 2.16.4 extraction update.\n\n- Use --enzyme dddb or --enzyme ddda; the bundled model selects DAF observation mode, so --mode daf is normally unnecessary.\n- Explain MD/CIGAR mismatch decoding, indexed reference-FASTA fallback, precedence, and what supplying a reference does not change.\n- Document integrated and standalone PCR dedup behavior, evidence sources, flag-only semantics, and key tuning options.\n- Include the opt-in --haplotype-fields extraction support introduced in v2.16.4.\n\nPyPI: https://pypi.org/project/fiberhmm/2.16.5/