sbol-db-0.1.0 is not a library.
sbol-db CLI entry point. Noun-first: top-level commands are nouns
(doc, object, query, ...), each with its own verbs. Daemons
(server, worker) stay top-level because they are the noun.
main parses the CLI, opens the storage backend when the command needs
it, and dispatches to a per-noun handler under cmd::*. Local utilities
(util) skip the backend open entirely.