Phase 1 (structure tree, --tagged-pdf, Figure /Alt) shipped. Phase 2 is conformance work. Canonical ticket: [T-004](https://github.com/Ztein/figmark/blob/main/docs/tickets/T-004-tagged-pdf-pdfua.md)
Phase 1 (structure tree, --tagged-pdf, Figure /Alt) shipped. Phase 2 is conformance work.
Canonical ticket: T-004