placement(wger): use preemptible titan-22 capacity

services/health/wger-deployment.yaml

@@ -55,14 +55,17 @@ spec:
           {{ .Data.data.SIGNING_KEY }}
           {{- end -}}
     spec:
+      # Wger can use titan-22's spare amd64 capacity, but Jellyfin keeps the
+      # higher media-core priority and can preempt it during media demand.
+      priorityClassName: scavenger
       affinity:
         nodeAffinity:
           requiredDuringSchedulingIgnoredDuringExecution:
             nodeSelectorTerms:
               - matchExpressions:
                   - key: kubernetes.io/hostname
-                    operator: NotIn
-                    values: ["titan-13", "titan-15", "titan-17", "titan-19"]
+                    operator: In
+                    values: ["titan-22"]
           preferredDuringSchedulingIgnoredDuringExecution:
             - weight: 100
               preference:
@@ -80,8 +83,13 @@ spec:
         fsGroup: 1000
         fsGroupChangePolicy: OnRootMismatch
       nodeSelector:
-        kubernetes.io/arch: arm64
+        kubernetes.io/arch: amd64
         node-role.kubernetes.io/worker: "true"
+      tolerations:
+        - key: atlas.bstein.dev/media-primary
+          operator: Equal
+          value: "true"
+          effect: PreferNoSchedule
       serviceAccountName: health-vault-sync
       initContainers:
         - name: init-storage