Add lab1 workload cluster manifest; workers sized 4 vCPU / 4 GiB

Generated with clusterctl v1.12.11 + the six runbook edits (pod CIDR,
kube-vip v1.2.4, no qcow2, VLAN 4, worker size, no MD replicas); passes
server-side dry run. Inflate test pods lowered to 1Gi to stay CPU-bound,
capacity annotation 4Gi, decision #15.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

configs/test/inflate.yaml

@@ -1,4 +1,6 @@
-# apply to the workload cluster; scale replicas to trigger scale-up (≈2 pods per 4 vCPU / 8 GiB worker)
+# apply to the workload cluster; scale replicas to trigger scale-up
+# 2 pods per 4 vCPU / 4 GiB worker: CPU-bound (2 × 1500m); 1Gi keeps memory from binding first
+# (a 4 GiB node has ~3.3–3.6 GiB allocatable, which would fit only one 2Gi pod)
 apiVersion: apps/v1
 kind: Deployment
 metadata:
@@ -15,4 +17,4 @@ spec:
         - name: pause
           image: registry.k8s.io/pause:3.10
           resources:
-            requests: { cpu: "1500m", memory: "2Gi" }
+            requests: { cpu: "1500m", memory: "1Gi" }