GizmoSQL: use sudo to drop page caches in run.sh

Without sudo, tee fails with "Permission denied" writing to
/proc/sys/vm/drop_caches.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: prmoore77

gizmosql/run.sh

@@ -19,7 +19,7 @@ for query in "${queries[@]}"; do
 
     # Clear Linux memory caches to ensure fair benchmark comparisons
     sync
-    echo 3 | tee /proc/sys/vm/drop_caches > /dev/null
+    echo 3 | sudo tee /proc/sys/vm/drop_caches > /dev/null
 
     # Start the GizmoSQL server
     start_gizmosql