Mesh v0.2.0 (license change: now fair-code)

Mesh is now fair-code under the Mesh Sustainable Use License (previously AGPL-3.0). Self-host and use it freely, including for your own clients' knowledge and context; you may not resell it as a hosted service. The pro layer (team-sync hub + BYOAI curator) remains a separate commercial product. Prior v0.1.x releases remain available under AGPL-3.0; this and future releases are under the Mesh SUL.