fix: Update CI workflow to set Couchbase environment for index setup

Modified the CI workflow to explicitly set the RAILS_ENV to 'test' when running the Couchbase index setup command. This ensures that the correct environment is used during the CI process, improving consistency and reliability of the integration tests.

Author: teetangh

.github/workflows/ci.yml

@@ -39,7 +39,7 @@ jobs:
           echo "Couchbase configuration validated successfully"
 
       - name: Setup Couchbase indexes
-        run: bundle exec rake couchbase:setup_indexes
+        run: RAILS_ENV=test bundle exec rake couchbase:setup_indexes
 
       - name: Run integration tests
         run: bundle exec rspec spec/requests/api/v1