chore: bump tower to 0.66.23 — Promote install-replay audit fixes

- partial-install visibility: error path now carries the modules
  installed before the failure, instead of silently dropping the list
- introspect log line: shows source-installed/target-installed/delta
  counts so the bell row narrates the comparison
- Authenticate calls: 15s timeout context (matches addon_lifecycle
  pattern; hung Odoo no longer pins the parent op)
- source readiness probe: 30s waitForOdooReady before introspect so
  source-down fails fast with clear message instead of cryptic auth

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: "0.66.22"
+    tag: "0.66.23"
     pullPolicy: IfNotPresent
   imagePullSecrets:
     - name: docker-mirror-pull