Add runtime restore and temp asset cleanup

apps/api/internal/runner/helpers.go

@@ -11,8 +11,18 @@ func stringFromMap(values map[string]any, key string) string {
 }
 
 func stringFromAny(value any) string {
-	text, _ := value.(string)
-	return strings.TrimSpace(text)
+	switch typed := value.(type) {
+	case string:
+		return strings.TrimSpace(typed)
+	case map[string]any:
+		if text := stringFromAny(typed["url"]); text != "" {
+			return text
+		}
+		if ref, ok := typed["assetRef"].(map[string]any); ok {
+			return stringFromAny(ref["url"])
+		}
+	}
+	return ""
 }
 
 func boolFromMap(values map[string]any, key string) bool {