When containers run in private netns (isolateContainers=true), host
loopback is unreachable so HIVE_FORGE_URL=http://127.0.0.1:3000 breaks.
- nix/modules/hive-network.nix: when isolateContainers is on + forge
is enabled, open forge.httpPort on the bridge interface so agents
can reach forgejo at bridgeIp:httpPort (forgejo binds 0.0.0.0)
- nix/modules/hive-c0re.nix: HIVE_FORGE_URL switches to bridge IP
when network.enable && isolateContainers; loopback path retained
when isolateContainers=false
- docs/network.md: add Forge access + Forge URL rows to effects table
- docs/gateway.md: rewrite HIVE_FORGE_URL section for both modes
c97120f016