Updated environment

docs/00-overview.md

@@ -59,6 +59,16 @@ require or assume the split-disk/multi-NIC layout Stage 2 wants.
 Everything below this point is the target design for when nodes 2 and 3
 are actually being provisioned. Not applicable to `pve1` as it stands.
 
+**`pve-test` existing does not mean node 2 exists.** A second physical
+node (`pve-test`) does run alongside `pve1` — see `05-node-roles.md` —
+but it's a sandbox/test box, not built to this Stage 2 design, and as of
+this writing runs on **wifi** networking
+(`06-pve-test-wifi-network.md`), which is directly incompatible with
+corosync's latency/jitter requirements below. `pve-test` and `pve1` were
+briefly clustered and then deliberately de-clustered for exactly this
+reason. Don't treat `pve-test` as progress toward Stage 2 without a
+deliberate decision to rebuild its networking first.
+
 ### End goal
 
 3-node Proxmox VE cluster with HA-managed VMs backed by **Ceph** — true