joshsiv-mulga 7ff013a120 refactor(vpcd): delete dhcp_manager + DHCP gateway-LRP path (Slice C) ...

Removes upstream-DHCP-client gateway-LRP allocation in favor of static
WAN-pool allocation (StaticRangeAllocator). Part of bead mulga-siv-125.3.3.

- delete services/vpcd/dhcp_manager.go + dhcp/ subpackage (~865 lines)
- delete allocateGatewayLRPIPViaDHCP + releaseGatewayLRPLease paths
- drop ExternalPoolConfig.Source + DhcpBindBridge + IsDHCP() fields
- drop ExternalIPAllocation lease fields (Expiry/ServerID/HWAddr) and
  ExternalIPAMRecord.Source
- drop NewExternalIPAM nc *nats.Conn argument; update all 4 call sites
- rename verifyBridgeMode local dhcpBindBridge -> wanBridge; update error
  strings and tests

Slice D (delete attachIGWLegacy + dispatcher) intentionally deferred.

2026-05-24 21:10:11 +10:00

..

main.go

refactor(vpcd): delete dhcp_manager + DHCP gateway-LRP path (Slice C)

2026-05-24 21:10:11 +10:00