WorldSeed v0.9.1 — Schema validation hotfix

WorldSeed v0.9.1 — Schema validation hotfix

This patch fixes the published road-graph JSON Schema without changing the v1 data contract.

Fixed

• Reworked the road-graph.json node schema so id, x, y, z, and edgeIds validate correctly under Draft 2020-12.
• Updated schema $id URLs to the v0.9.1 source tag.
• Updated generated WorldSeed version metadata to 0.9.1.

Compatibility

The exported data contract remains schemaVersion 1.0. Existing v0.9.0 export data remains compatible; this release corrects the machine-readable validator definition.

For new integrations, use v0.9.1 or later.