Description

The Kotlin ConstraintsPreset was missing the @Valid annotation for array, object, and reference properties, effectively disabling cascading validation. This is the same issue that was fixed for the Java generator in #2175.

Without @Valid, validation constraints on nested objects and array elements are never triggered, so invalid data in nested structures passes silently.

Changes

• Add @Valid annotation (@get:Valid in Kotlin syntax) for ConstrainedArrayModel, ConstrainedObjectModel, and ConstrainedReferenceModel properties
• Add javax.validation.Valid (or jakarta.validation.Valid when useJakarta: true) to imports
• Add test case verifying @Valid is rendered for nested object and array properties
• Update existing test snapshots to include new import

Example output

data class NestedClazz(
    @get:Valid
    val arrayProp: List<String>? = null,
    @get:Valid
    val objProp: ObjProp? = null,
)

Related issue

Fixes #2573