SQLite persistence layer for sbol-db.
Implements the sbol-db-storage contract over SQLite, mirroring the
Postgres model with portable SQL: the triplestore (with set semantics), the
graph registry, the derived object view, ontology loading, neighborhood
traversal, sequence search, the job queue, and the SynBioHub query
accelerator. The backend passes the full sbol-db-conformance suite.