ci: use Node 24 for npm trusted publishing OIDC support (#12)

* ci: remove redundant test step from publish workflow

Tests already run in CI workflow and are required to pass before merge.
Running them again in publish workflow was redundant and would fail
anyway due to missing Redis service container.

* ci: use Node 24 for npm trusted publishing OIDC support

npm trusted publishing via OIDC requires npm >= 11.5.1 or Node >= 24.
Node 20's npm version is too old and fails with "Access token expired"
errors when trying to use OIDC authentication.

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Co-authored-by: Claude <noreply@anthropic.com>

Author: simllll

.github/workflows/publish.yml

@@ -27,7 +27,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '20'
+          node-version: '24'
           registry-url: 'https://registry.npmjs.org'
           cache: 'pnpm'