v0.9.0 - Handle <swh:create_origin> / <swh:add_to_origin> in multipart uploads - Split <swh:create_origin> / <swh:add_to_origin> handling to its own function - Catch invalid dates before marking a deposit as verified - tests: Reorganize and refactor boilerplate - docs: Rephrase introduction of the metadata-only deposit documentation - docs: Document metadata updates