OSEAN-CTR supporting data: Vaccine Ontology, CTR feature sidecars, and frozen evaluation artifacts

Supporting data for OSEAN-CTR (SEA-CDM-based vaccine trial evidence integration and ontology-guided design-field prediction). Includes Vaccine Ontology OWL (release 2026-06-12), CTR feature sidecars, frozen result JSON artifacts, and class-label helpers. Companion code: https://github.com/zhujiadongok/osean-ctr. Full AACT dump is not redistributed; local snapshot identifiers and checksums are documented in README.md and the manuscript Table S8.