Adds back the Parent Container selector in NodeModal, shown when:
- child type is lxc or vm (parents: proxmox/vm/lxc/docker_host)
- child type is docker_container (parents: docker_host/lxc/vm/proxmox)
Selector hidden when no valid candidate node exists on the canvas.
Centralizes the parent-type allowlist in getValidParentTypes
(shared with the virtual-edge auto-parent helper).
ha-relevant: yes
Extend docker_container parent rule to accept vm and proxmox nodes
in addition to docker_host and lxc, covering nested virtualization
topologies (Docker on a VM, Docker directly on Proxmox host).
ha-relevant: yes
Previously docker_container could only attach to a docker_host via
virtual edge. Extend the rule so an LXC node can also act as parent,
enabling docker_container nesting under LXC without requiring an
intermediate docker_host.
Extracts the virtual-edge parent rule into a pure helper
(resolveVirtualEdgeParent) with unit tests covering all type pairs.
ha-relevant: yes
Pouzor