Harden Protocol Neutrality Governance

PDPP's root protocol spec and public site should state the protocol's implementation-neutral posture directly. Current prose implies that posture through URI-based identifiers and grant-pinned manifests, but reviewers should not have to infer that PDPP conformance is independent of any specific hosted service, chain, token, registry, or vendor deployment.

The existing protocol design is already URI-federated and grant-pinned: connector identifiers and purpose codes are URIs, grants carry the resolved manifest_version, and resource servers enforce the resolved grant rather than depending on a live centralized registry lookup.

Root PDPP protocol prose and derived public-site documentation SHALL make clear that PDPP conformance does not depend on any specific vendor-hosted service, token, chain, centralized registry lookup, or repository deployment.