tower 0.61.4 — stamp owner tenant on cluster Secret at connect time

UpsertCluster was not setting the odoosky.io/tenant-id label on the
ArgoCD cluster Secret. Result: handleListServers tenant filter
attributed every freshly-connected cluster to no-tenant, making the
just-connected box invisible to the operator who registered it.

Threads ownerTenantID from the connect token through to the body of
the POST /api/v1/clusters call. Backfill of any pre-fix cluster
Secret is a one-line kubectl label.

values.yaml

@@ -9,7 +9,7 @@ backend:
     # so every cluster that runs Tower needs the same imagePullSecret
     # provisioned out-of-band (until cluster-platform-v3 owns it).
     repository: registry.odoosky.cloud/odoosky/docker-mirror/tower
-    tag: "0.61.3"
+    tag: "0.61.4"
     pullPolicy: IfNotPresent
   imagePullSecrets:
     - name: docker-mirror-pull