ci: update server-test.yml to use single statements

Author: fanyang01

.github/workflows/server-test.yml

@@ -63,8 +63,8 @@ jobs:
       - name: Test DuckDB SQL features
         run: |
           # Test some DuckDB-specific features through PostgreSQL protocol
+          psql -h 127.0.0.1 -p 15432 -U postgres -c "CREATE TABLE numbers AS SELECT * FROM range(1, 5) t(n);"
           psql -h 127.0.0.1 -p 15432 -U postgres -c "
-            CREATE TABLE numbers AS SELECT * FROM range(1, 5) t(n);
             SELECT list_aggregate(list(n), 'sum') as list_sum FROM numbers;" | tee duckdb_results.txt
 
           # Verify results (sum should be 10)
@@ -78,4 +78,4 @@ jobs:
       - name: Cleanup
         if: always()
         run: |
-          docker rm -f myduck || true
+          docker rm -f myduck || true