fix: add privilege grants for database user in setup script

setup_database.sh

@@ -85,4 +85,10 @@ CREATE TABLE IF NOT EXISTS packet_log (
 );
 EOF
 
+echo "[7] Grant privileges to user…"
+sudo -u postgres psql -d $DB_NAME <<EOF
+GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO $DB_USER;
+ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT ALL PRIVILEGES ON TABLES TO $DB_USER;
+EOF
+
 echo "Done. PostgreSQL is ready for LAN + localhost connections."