fix(ci): reconcile the workflows with actions.lock (gh-actions-lock v0.1.6)

`actions.lock` is authoritative: the workflows carry readable refs and the lock records the
commit each ref resolves to, which is what actually runs. Refs that stop matching the manifest
make the whole repository unstartable — `startup_failure`, "Invalid lockfile".

Regenerated with the official extension (`github/gh-actions-lock`). The hand-pinned SHA refs are
reverted to their readable form here precisely because the lockfile, not the workflow, is what
pins them.

Author: hyperpolymath

.github/workflows/governance.yml

@@ -1,3 +1,4 @@
+# This workflow is managed by gh actions-lock.
 # SPDX-License-Identifier: MPL-2.0
 # This workflow is managed by gh actions-lock.
 # governance.yml — single wrapper calling the shared estate governance bundle

.github/workflows/hypatia-scan.yml

@@ -1,3 +1,4 @@
+# This workflow is managed by gh actions-lock.
 # SPDX-License-Identifier: MPL-2.0
 # This workflow is managed by gh actions-lock.
 # Thin wrapper around hyperpolymath/standards hypatia-scan-reusable.yml.

.github/workflows/label-triage.yml

@@ -1,3 +1,4 @@
+# This workflow is managed by gh actions-lock.
 # SPDX-License-Identifier: MPL-2.0
 name: Label Triage
 

.github/workflows/labels.yml

@@ -1,3 +1,4 @@
+# This workflow is managed by gh actions-lock.
 # SPDX-License-Identifier: MPL-2.0
 name: Labels
 

.github/workflows/push-email-notify.yml

@@ -1,3 +1,4 @@
+# This workflow is managed by gh actions-lock.
 # SPDX-License-Identifier: MPL-2.0
 # This workflow is managed by gh actions-lock.
 # Dormant push-email notification. ARMED by setting the repo variable
@@ -40,7 +41,7 @@ jobs:
     timeout-minutes: 5
     steps:
       - name: Send push notification email
-        uses: hyperpolymath/smtp-notify-action@ede1191ef6ff3ac02c4f4d9efdf837ee517e11d7  # NOSONAR — pin authority is actions.lock (sha1-ede1191ef6ff3ac02c4f4d9efdf837ee517e11d7)
+        uses: hyperpolymath/smtp-notify-action@v0.2.0
         with:
           server_address: ${{ secrets.SMTP_HOST }}
           server_port: ${{ secrets.SMTP_PORT }}

.github/workflows/secret-scanner.yml

@@ -1,3 +1,4 @@
+# This workflow is managed by gh actions-lock.
 # SPDX-License-Identifier: MPL-2.0
 # This workflow is managed by gh actions-lock.
 # Calls the estate's shared secret scanner (gitleaks + rust-secrets +