IdentityMapper v0.36.0

Compliance badge documentation checkpoint. Adds docs/compliance-badge.md, documents the IdentityMapper Protocol 1.0 Draft compliant claim, required statement fields, what the badge confirms, and what it does not confirm. Core domain, capability contracts, runtime behavior, providers, and target mappers remain unchanged. Verified: 749 tests passed, 5 compliance tests passed, compileall OK.