ship: tower 0.57.0 -> 0.57.1 (ServeMux pattern conflict fix)

0.57.0 had a Go ServeMux ambiguity between /api/servers/{name}/capacity and /api/servers/connect-token/{token}. Moved the new endpoints to /api/connect-tokens/* to break the wildcard collision.

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: "0.57.0"
+    tag: "0.57.1"
     pullPolicy: IfNotPresent
   imagePullSecrets:
     - name: docker-mirror-pull