fix: address Copilot review — validation, error handling, MAC case

- Add ValidateSet('8','9','all') to dev.ps1 -Version parameter
- Fix Shell warning to reference $DevContainer not $InfraContainer
- Fix Skip-IfNoNodeB to check $PasswordB not $Password
- Pass PVE_TARGET_NODE to wait-for-pve.sh instead of auto-discovering
- Add error default cases to all pve_* helper functions
- Lowercase MAC addresses for answer server matching
- Create answer file paths before terraform destroy in cleanup

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/infrastructure/scripts/wait-for-pve.sh

@@ -2,7 +2,7 @@
 # Wait for a fresh nested PVE instance to boot, discover its IP via the QEMU guest agent,
 # then wait for the PVE API to become responsive.
 #
-# Usage: wait-for-pve.sh <parent-pve-endpoint> <parent-api-token> <vm-id> <root-password> [max-wait-seconds]
+# Usage: wait-for-pve.sh <parent-pve-endpoint> <parent-api-token> <parent-node> <vm-id> <root-password> [max-wait-seconds]
 #   Outputs:
 #     IP=<discovered-ip>
 #     NODE=<pve-hostname>
@@ -10,14 +10,12 @@ set -euo pipefail
 
 PARENT_ENDPOINT="${1%/}"
 PARENT_TOKEN="$2"
-VM_ID="$3"
-ROOT_PASSWORD="$4"
-MAX_WAIT="${5:-600}"
+PARENT_NODE="$3"
+VM_ID="$4"
+ROOT_PASSWORD="$5"
+MAX_WAIT="${6:-600}"
 INTERVAL=10
 PARENT_API="${PARENT_ENDPOINT}/api2/json"
-NODES_JSON=$(curl -sk -H "Authorization: PVEAPIToken=${PARENT_TOKEN}" \
-    "${PARENT_API}/nodes")
-PARENT_NODE=$(echo "$NODES_JSON" | python3 -c "import json,sys; print(json.load(sys.stdin)['data'][0]['node'])")
 
 # --- Phase 1: Discover IP via QEMU guest agent ---
 echo "Waiting for guest agent on VM ${VM_ID} (node: ${PARENT_NODE})..."