metallb: remove unused BGP sidecars from the L2 cluster

infrastructure/metallb/helmrelease.yaml

@@ -45,3 +45,26 @@ spec:
                       - rpi5
     speaker:
       logLevel: info
+      # Atlas uses L2 advertisements; there are no BGP peers or advertisements.
+      frr:
+        enabled: false
+      resources:
+        requests:
+          cpu: 50m
+          memory: 128Mi
+        limits:
+          cpu: 500m
+          memory: 512Mi
+      readinessProbe:
+        timeoutSeconds: 5
+      livenessProbe:
+        timeoutSeconds: 5
+      # Restore eligibility after these offline nodes pass their recovery checks.
+      affinity:
+        nodeAffinity:
+          requiredDuringSchedulingIgnoredDuringExecution:
+            nodeSelectorTerms:
+              - matchExpressions:
+                  - key: kubernetes.io/hostname
+                    operator: NotIn
+                    values: [titan-05, titan-06]