fix: use vars.CONTINUE_APP_ID instead of secrets for App ID

GitHub App IDs are not sensitive and should be stored as repository
variables (vars) rather than secrets. This allows the workflow to
properly detect when the App ID is configured.

- Changed if condition from secrets.CONTINUE_APP_ID to vars.CONTINUE_APP_ID
- Changed app-id input from secrets.CONTINUE_APP_ID to vars.CONTINUE_APP_ID
- Private key remains as secrets.CONTINUE_APP_PRIVATE_KEY (correct)

Generated with [Continue](https://continue.dev)

Co-Authored-By: Continue <noreply@continue.dev>

Author: bdougie

.github/workflows/code-review-debug.yml

@@ -25,11 +25,11 @@ jobs:
           fetch-depth: 0
 
       - name: Generate App Token (Optional)
-        if: secrets.CONTINUE_APP_ID != '' && secrets.CONTINUE_APP_PRIVATE_KEY != ''
+        if: vars.CONTINUE_APP_ID != '' && secrets.CONTINUE_APP_PRIVATE_KEY != ''
         id: generate_token
         uses: actions/create-github-app-token@v1
         with:
-          app-id: ${{ secrets.CONTINUE_APP_ID }}
+          app-id: ${{ vars.CONTINUE_APP_ID }}
           private-key: ${{ secrets.CONTINUE_APP_PRIVATE_KEY }}
 
       - name: Setup Node.js