chore: bump tower to 0.66.22 — Promote install-delta replay (Step 1)

Promote no longer ships only code. After commit + sync it now:
- waits for target Odoo readiness
- queries source + target for installed-set across the recipe
- pre-checkpoint on target (best-effort)
- ButtonImmediate(install) on target for the delta

Op stays running until install hooks complete; complete means
prods Modules tab matches stages installed-set, not just mount layer.

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: "0.66.21"
+    tag: "0.66.22"
     pullPolicy: IfNotPresent
   imagePullSecrets:
     - name: docker-mirror-pull