Integrate cleanup into pipeline execution

internal/app/cleanup_targets.go

@@ -7,6 +7,16 @@ import (
 	"strings"
 )
 
+type scopedDir struct {
+	RootAbs   string
+	TargetAbs string
+	Exists    bool
+}
+
+func validateScopedDir(root, target, policy string) (scopedDir, error) {
+	return validateScopedTarget(root, target, policy, true)
+}
+
 func validateScopedTarget(root, target, policy string, requireDir bool) (scopedDir, error) {
 	cleanRoot := strings.TrimSpace(root)
 	cleanTarget := strings.TrimSpace(target)