v0.3.0.4: Agent-hop swarm routing

0.3.0.4: Agent-hop swarm routing

Fixes multi-machine mesh routing so a gateway (Honcho, editors, or any OpenAI client) reaches peers via peer agent URLs (http://<LAN-IP>:11400/v1) instead of unreachable loopback oMLX rows from another host.

Fixes

• Agent-hop backends: peer_agent_backends() emits one routable backend per LAN peer; gateways no longer merge peer 127.0.0.1:8080 URLs into the pool
• Round-robin distribution: round_robin alternates local inference and peer agent hops when the same model exists on multiple machines
• Self-peer guard: config save, peers --save, and dashboard peers-scan skip this host's own listen_url in swarm.peers
• mDNS LAN URL: wildcard bind (0.0.0.0:11400) advertises LAN IP in status/heartbeat (existing behavior; regression test added)

Verify (two-machine LAN)

# Gateway — Honcho points here; routing.default_strategy = "round_robin"
./netllm serve --host 0.0.0.0
./netllm status    # peer backend: http://<peer-LAN>:11400/v1

./netllm test --model <shared-model>

curl -s http://127.0.0.1:11400/metrics | rg netllm_requests_total
curl -s http://<peer-LAN-IP>:11400/metrics | rg netllm_requests_total

Both metrics should increase when traffic round-robins across machines.

Docs

• honcho-integration.md: agent-hop diagram and metrics check
• netllm-swarm skill: gateway + round_robin guidance

Previous release

• v0.3.0.3 notes: macOS swarm Settings QoL + web dashboard admin