fix: correct typo in smoke test and use binary install mode for golangci-lint

scripts/smoke_test.sh

@@ -121,7 +121,7 @@ run_test "read file in workspace" "pass" "$GREYWALL_BIN" -c "cat $WORKSPACE/test
 
 # Test: Write outside workspace blocked
 # Create a settings file that only allows write to current workspace
-SETTINGS_FILE="$WORKSPAC./greywall.json"
+SETTINGS_FILE="$WORKSPACE/greywall.json"
 cat > "$SETTINGS_FILE" << EOF
 {
   "filesystem": {