Add pve-test.sweet.home as a second Proxmox target

pve1.sweet.home is production; scripts/env.sh now also defines
PVE_TEST_HOST for a separate sandbox node, individually targetable via
--node/PROXMOX_HOST. Tooling defaults are unchanged (still pve1) -- the
new restriction (Claude defaults to pve-test unless explicitly told to
use pve1) is documented as policy in CLAUDE.md, not enforced in the
scripts.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

scripts/proxmox/create-proxmox-resource.sh

@@ -12,6 +12,17 @@
 # copies over the locally-managed host-keys/ (gitignored, so a git pull
 # alone wouldn't carry it) before building.
 #
+# --node (default: $PROXMOX_HOST, see scripts/env.sh) picks which of the two
+# LAN Proxmox nodes this runs against: production, pve1.sweet.home
+# ($PVE1_HOST, PROXMOX_HOST's own default), or the sandbox node,
+# pve-test.sweet.home ($PVE_TEST_HOST) -- pass --node "$PVE_TEST_HOST" (or
+# set PROXMOX_HOST=$PVE_TEST_HOST) to target the sandbox instead. See
+# CLAUDE.md's "Two Proxmox nodes" section: an agent session should default
+# to pve-test and only touch pve1 when the operator has explicitly said so
+# for the current task -- this script itself doesn't enforce that (its own
+# default is production, matching this repo's behavior before pve-test
+# existed), it's a policy for whoever/whatever is driving it.
+#
 # Usage:
 #   scripts/proxmox/create-proxmox-resource.sh --type lxc|vm --host <name> [options]
 #   scripts/proxmox/create-proxmox-resource.sh --type lxc|vm --list
@@ -120,7 +131,9 @@ Shared:
   --iso-storage <pool>            (default: \$PROXMOX_ISO_STORAGE, ${PROXMOX_ISO_STORAGE})
   --bridge <bridge>                (default: \$PROXMOX_BRIDGE, ${PROXMOX_BRIDGE})
   --node <host>                     Proxmox node to SSH into (default:
-                                    \$PROXMOX_HOST, ${PROXMOX_HOST})
+                                    \$PROXMOX_HOST, ${PROXMOX_HOST} --
+                                    production; the sandbox node is
+                                    \$PVE_TEST_HOST, ${PVE_TEST_HOST}).
   --dry-run                           Print the full plan; touch nothing
                                       local or remote, no prompts.
   -h, --help