recovery(atlas): stop post-outage control-plane churn

infrastructure/longhorn/core/helmrelease.yaml

@@ -26,6 +26,9 @@ spec:
     cleanupOnFail: true
     timeout: 15m
   values:
+    global:
+      nodeSelector:
+        longhorn-host: "true"
     service:
       ui:
         type: NodePort
@@ -78,3 +81,12 @@ spec:
           tag: v2.16.0
     defaultSettings:
       systemManagedPodsImagePullPolicy: Always
+    longhornManager:
+      nodeSelector:
+        longhorn-host: "true"
+    longhornDriver:
+      nodeSelector:
+        longhorn-host: "true"
+    longhornUI:
+      nodeSelector:
+        longhorn-host: "true"

services/ai-llm/deployment.yaml

@@ -5,7 +5,7 @@ metadata:
   name: ollama
   namespace: ai
 spec:
-  replicas: 1
+  replicas: 0
   revisionHistoryLimit: 2
   strategy:
     type: RollingUpdate