Member Library Platform 0.9.0

Migration packages now link uploads that WP Offload Media already keeps in the shared storage bucket instead of bundling them: production verifies each object and registers the attachment at the same key, and rolling back never deletes the shared object. Videos the exporter does not bundle are no longer hashed, so the Liberty Classroom export dropped from about two minutes to under a second. Speakers no longer export a legacy MemberPress authorization, and Access Groups no longer fail closed without a Masterclasses collection, which unblocks Liberty Classroom imports.