Record the provider health validation and add the changelog entry

The user ran the real-hypervisor checks against beelink and confirmed they
passed, which completes Step 7 of the provider health plan.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

docs/plans-executions/2026-09-11-1526-provider-health-checks.md

@@ -8,7 +8,7 @@ Plan: [docs/plans/2026-09-11-1526-provider-health-checks.md](../plans/2026-09-11
 - [x] Step 4 — Monitor
 - [x] Step 5 — Metrics and wiring
 - [x] Step 6 — Docs
-- [ ] Step 7 — Validate, record, push, open the PR
+- [x] Step 7 — Validate, record, push, open the PR
 
 ## Step 0 — Save the plan
 
@@ -363,3 +363,16 @@ Worth noting:
   the same commit: the old text promised the drop-on-timeout behaviour that is now gone.
 - The real-hypervisor commands from the plan's Verification section are still the user's
   to run; nothing here replaces them.
+
+### Real-hypervisor validation and PR
+
+The user ran the plan's real-hypervisor checks against beelink (the `TestKVMCheck`
+integration test plus the manual `ProviderHealth` and metrics checks) and confirmed
+they passed. After that the CHANGELOG entry went in, and the branch was pushed with
+the token-file credential helper. The PR against `main` was opened through the Gitea
+API because `tea` isn't installed.
+
+Worth noting:
+- The branch also carries `docs/plans/2026-09-16-0841-provider-blueprint.md`, on
+  purpose: that plan reaches `main` with this merge, and the blueprint work starts on a
+  new branch afterwards.