docs(agents): never close tickets without user permission

New NON-NEGOTIABLE rule: agents may suggest closing a ticket when the
result is clearly scoped and delivered, but must never close without
explicit user permission. Added to both PFVCluster AGENTS.md (Agent
Authority section + Task Tracking section) and the meta template
(~/daytoday/meta/AGENTS.md Systems of Record section).

Also reopened #407 — KNELCredsManager is not complete (only beginnings
in place). Corrected Vault understanding: deployed on Cloudron, not SITER k8s.

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Assisted-by: Crush:glm-5.2

AGENTS.md

@@ -41,6 +41,12 @@ There are no exceptions to this rule.**
    or directly. Asking is always acceptable. Overstepping is never
    acceptable.
 
+7. **NEVER close a ticket without explicit user permission.** You may
+   SUGGEST a close when the result is clearly scoped and delivered. If
+   it's ambiguous whether the work is truly complete, don't suggest a
+   close — leave that decision to the user. This applies to ALL tickets,
+   no exceptions.
+
 ### Access-channel policy: SSH only (NON-NEGOTIABLE)
 
 **The qemu guest-agent is NEVER an access, execution, or key-delivery
@@ -64,6 +70,14 @@ environment — there is no back-door exception, ever.
   it to the user. Do NOT improvise an alternate back-channel. The user
   authorizes the unblock method (console login, credential, etc.).
 
+### Ticket-closing policy (NON-NEGOTIABLE)
+
+**NEVER close a Redmine ticket without explicit user permission.** You
+may SUGGEST a close when the result is clearly scoped and delivered. If
+it's ambiguous whether the work is truly complete, don't suggest a close
+— leave that decision to the user. This applies to ALL tickets, no
+exceptions.
+
 ### What this means in practice
 
 - Discovered a typo in a config during approved work? **Finish the approved
@@ -114,6 +128,8 @@ for a full audit or `--fast` for pre-commit speed. Bypass with `--no-verify`
 ## Task Tracking
 
 - **Redmine is the system of record for all work.**
+- **NEVER close a ticket without explicit user permission.** Suggest a
+  close when clearly scoped/delivered; if ambiguous, don't suggest.
 - **WORKING.md** is the only in-repo task tracker — a scratchpad for the current
   session. The pre-commit hook blocks commits while any task remains unchecked.
 - Clear WORKING.md before responding to the user.
@@ -232,7 +248,11 @@ checklists, or TODOs in repo files. Use Redmine tickets instead.
 2. **Reference tickets in docs and commits** using `[#NNN]` notation.
    Example: `[#367] Rebuilt k3s control plane after cnode wipe`.
 3. **When work completes**, update the ticket: set done ratio to 100%,
-   add a note describing what was done and where the code lives, then close.
+   add a note describing what was done and where the code lives.
+   **NEVER close a ticket without explicit user permission.** You may
+   SUGGEST a close when the result is clearly scoped and delivered. If
+   it's ambiguous whether the work is truly complete, don't suggest a
+   close — leave that decision to the user.
 4. **Operations Status** lives on Discourse ([topic #297](https://community.turnsys.com/t/297)) — update that wiki topic if the infrastructure summary needs refreshing. The `STATUS.md` file in git is now a pointer only.
 5. **Link code to tickets** — ticket descriptions and notes should reference
    the relevant file paths in this repo (e.g., `dcinfra/ups/`).