Resolves the location of the local ToxValDB DuckDB database. Checks
getOption("ComptoxR.toxval_path") first, then falls back to
tools::R_user_dir("ComptoxR", "data").
Resolves the location of the local ToxValDB DuckDB database. Checks
getOption("ComptoxR.toxval_path") first, then falls back to
tools::R_user_dir("ComptoxR", "data").