fix(neuron-prod): set neuron-marketing-hpa minReplicas to 1 (#8)

servers/legion/k8s/neuron-technologies/prod/hpa.yaml

@@ -82,7 +82,12 @@ spec:
     apiVersion: apps/v1
     kind: Deployment
     name: neuron-marketing
-  minReplicas: 0
+  # minReplicas=1 to match the file's own convention (see header comment).
+  # Kubernetes only allows minReplicas=0 when at least one Object or External
+  # metric is configured (queue depth, custom signal, etc.); with only a
+  # Resource (CPU) metric, scale-to-zero is rejected and the whole HPA is
+  # invalid — which was blocking neuron-prod's Argo CD sync.
+  minReplicas: 1
   maxReplicas: 8
   metrics:
     - type: Resource