Introduces the `annotate` subcommand to apply genome metadata from an external CSV file to a pre-built k-mer index. The command supports configurable field separators, ID columns, and null markers, while providing a `--dump` option to export current index metadata as sorted CSV. Supporting changes include minor internal refactoring in `obikindex` to use object-level directory accessors and updates to the `csv` dependency.
Eric Coissac
fba9c65b1a