mvm-s3 is a separate VK Cloud project whose admin pre-created two private
networks/subnets with a known IP per router. Unify project-managed
(private_network_cidrs, IPAM-assigned) and externally-owned (router_networks,
fixed-IP) private interfaces into one local.router_interfaces so both share
the existing port/dynamic-network mechanism instead of duplicating it.
Switch from implicit *.auto.tfvars loading to explicit -var-file per
environment (now two share this terraform/ directory) plus a dedicated
Terraform workspace for mvm-s3, so PROD's state and credentials are never
touched by mvm-s3 applies.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GHfG9FgpMrGdrvC1QUewTw
