Each pod now gets a unique VNIC name and IP address from a configurable
CIDR pool, with IPs released on pod deletion. This replaces the
hardcoded single VNIC/IP that prevented multiple pods from running.
- Add redb-backed IPAM module with allocate/release/idempotent semantics
- Add prefix_len to EtherstubConfig and DirectNicConfig
- Generate allowed-address and defrouter in zonecfg net blocks
- Wire vnic_name_for_pod() into controller for unique VNIC names
- Add --pod-cidr and --etherstub-name CLI flags to agent subcommand
- Add StorageError and IpamPoolExhausted error variants with diagnostics
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>