feat: Sprint 9 — mesh identity, store-and-forward, broadcast channels
Self-sovereign mesh networking for offline-capable Freifunk deployments.
- MeshIdentity: Ed25519 keypair-based identity without AS registration,
JSON-persisted seed + known peers directory, sign/verify
- MeshEnvelope: signed store-and-forward envelope with TTL, hop_count,
max_hops, SHA-256 dedup ID, Ed25519 signature verification
- MeshStore: in-memory message queue with dedup, per-recipient capacity
limits, TTL-based garbage collection
- BroadcastChannel: symmetric ChaCha20-Poly1305 encrypted topic-based
pub/sub for mesh announcements, no MLS overhead
- BroadcastManager: subscribe/unsubscribe/create channels by topic
- P2pNode integration: send_mesh(), receive_mesh(), forward_stored(),
subscribe(), create_broadcast(), broadcast()
- Extended mesh REPL: /mesh send, /mesh broadcast, /mesh subscribe,
/mesh route, /mesh identity, /mesh store (feature-gated)
28 P2P tests pass (21 existing + 7 broadcast). All builds clean.
Christian Nennemann
1b61b7ee8f