Mesh native identity and peer public key

core_mesh explicitly ownsLocalIdentity、PeerPublicKey、PeerIdentityService and identity stores; it does not have a full contact entity named PeerIdentity.

Key rules

• Generate and save private key materials when the local identity does not exist.
• peer key only accepts valid unicast NodeIds.
• Verified and different keys cannot be overwritten by unverified observations.
• PeerPublicKey does not own contact names or cross-protocol personas.

Drill down: local identity establishment and peer public key protection