Obligation-First v0.4.3

Patch: revert unintended v0.4.2 jurisdiction/ref pattern constraint that broke supranational adopter records; restores v0.4.1 contract.

• manifest.json - machine-readable release package manifest
• sha256.txt - SHA-256 checksum index
• RELEASE_NOTES-v0.4.3.md - release notes and verification summary
• /v1/context.jsonld - JSON-LD context
• /v1/schema/ - JSON Schemas
• /.well-known/assistant-guide.txt - GuideCheck assistant guide

Full changelog