pnpm corepack, CI bugfix and no warnings for TIMEID

.github/workflows/release.yml

@@ -40,12 +40,17 @@ jobs:
               uses: actions/setup-node@v6
               with:
                   node-version: 24
-                  cache: 'npm'
+
+            # Node ships corepack, which selects the pnpm version pinned in
+            # package.json ("packageManager"). If this self-hosted runner has no
+            # Node, drop the setup-node step above and rely on a preinstalled Node.
+            - name: Enable pnpm
+              run: corepack enable
 
             - name: Build plugin
               run: |
-                  npm ci
-                  npm run build
+                  pnpm install --frozen-lockfile
+                  pnpm run build
 
             - name: Check for optional styles
               id: styles