test(scopes): run race checks on the Linux CI runner

.github/workflows/ci.yml

@@ -47,6 +47,9 @@ jobs:
       - name: Test
         run: go test ./...
 
+      - name: Verify scope refresh concurrency
+        run: go test -race ./internal/meshmapper ./internal/scopestore
+
       - name: Verify backup startup against PostgreSQL 16
         env:
           BEACON_TEST_POSTGRES_DSN: postgres://postgres:backup-ci-only@127.0.0.1:5432/postgres?sslmode=disable