Dorian 4fef4843b5 feat: issue FederationTrustCredential on federation join
- Issue W3C VC (type FederationTrustCredential) when joining federation
- Claims: federationPeer=true, establishedAt=timestamp
- Signed with node Ed25519 identity key
- Runs in background task (non-blocking)
- Stored via credentials system for later verification

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-14 03:54:27 +00:00
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