Update Ansible configuration to integrate SOPS for managing secrets. Enhance README.md with SOPS usage instructions and prerequisites. Remove External Secrets Operator references and related configurations from the bootstrap process, streamlining the deployment. Adjust playbooks and roles to apply SOPS-encrypted secrets automatically, improving security and clarity in secret management.

ansible/roles/noble_landing_urls/templates/noble-lab-ui-urls.md.j2

@@ -24,7 +24,6 @@ This file is **generated** by Ansible (`noble_landing_urls` role). Use it as a t
 | **Prometheus** | — | No auth in default install (lab). |
 | **Alertmanager** | — | No auth in default install (lab). |
 | **Longhorn** | — | No default login unless you enable access control in the UI settings. |
-| **Vault** | Token | Root token is only from **`vault operator init`** (not stored in git). See `clusters/noble/bootstrap/vault/README.md`. |
 
 ### Commands to retrieve passwords (if not filled above)
 
@@ -46,7 +45,7 @@ To generate this file **without** calling kubectl, run Ansible with **`-e noble_
 
 - **Argo CD** `argocd-initial-admin-secret` disappears after you change the admin password.
 - **Grafana** password is random unless you set `grafana.adminPassword` in chart values.
-- **Vault** UI needs **unsealed** Vault; tokens come from your chosen auth method.
 - **Prometheus / Alertmanager** UIs are unauthenticated by default — restrict when hardening (`talos/CLUSTER-BUILD.md` Phase G).
+- **SOPS:** cluster secrets in git under **`clusters/noble/secrets/`** are encrypted; decrypt with **`age-key.txt`** (not in git). See **`clusters/noble/secrets/README.md`**.
 - **Headlamp** token above expires after the configured duration; re-run Ansible or `kubectl create token` to refresh.
 - **Velero** has **no web UI** — use **`velero`** CLI or **`kubectl -n velero get backup,schedule,backupstoragelocation`**. Metrics: **`velero`** Service in **`velero`** (Prometheus scrape). See `clusters/noble/bootstrap/velero/README.md`.