chore: check file existence before running psql against it

Author: pcnc

ansible/files/admin_api_scripts/pg_upgrade_complete.sh

@@ -60,7 +60,9 @@ function complete_pg_upgrade {
 
     if [ -d /data/sql ]; then
         for FILE in /data/sql/*.sql; do
-            run_sql -f $FILE
+            if [ -f "$FILE" ]; then
+                run_sql -f $FILE
+            fi
         done
     fi