Remove all companion draft (ect-pol) references, regulatory
compliance mappings, pre-defined extension keys, witness concept,
pseudocode blocks, implementation guidance appendix, and redundant
examples. Keep only the core token format, DAG validation,
verification procedure, and one cross-organization use case.
Draft reduced from ~40 pages to 27 pages.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
