public boolean isPending() {
                return switch (this) {
                    case DEPLOYED, FAILED, UNDEPLOYED -> false;
                    case DEPLOYING, UNDEPLOYING -> true;
                };
            }
Indicates whether the application is invalid.
Only applicable for schema-rich applications.
Set to true when validation fails (e.g., missing required properties or schema violations).
Null when the application is valid.
This is a read-only property (not parsed from JSON).
config/src/main/java/com/epam/aidial/core/config/Application.java