ci(warden): Pass Warden Service URL and token to the review job (#210)

Expose the org-wide WARDEN_SERVICE_URL variable and WARDEN_SERVICE_TOKEN
secret to the Warden job so the action can reach Warden Service.

The URL comes from the `vars` context rather than `env`, since org and
repository variables are only available through `vars` — reading it from
`env` would self-reference the job's own env block and resolve to an
empty string.

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

Author: oioki

.github/workflows/warden.yml

@@ -16,6 +16,8 @@ jobs:
       WARDEN_OPENROUTER_API_KEY: ${{ secrets.WARDEN_OPENROUTER_API_KEY }}
       WARDEN_MODEL: ${{ secrets.WARDEN_MODEL }}
       WARDEN_SENTRY_DSN: ${{ secrets.WARDEN_SENTRY_DSN }}
+      WARDEN_SERVICE_URL: ${{ vars.WARDEN_SERVICE_URL }}
+      WARDEN_SERVICE_TOKEN: ${{ secrets.WARDEN_SERVICE_TOKEN }}
     steps:
       - name: Check Warden credentials
         env: