fixup! Add DataFrame.require API for typed selector validation

Author: koperagen

core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/impl/api/require.kt

@@ -11,7 +11,7 @@ import kotlin.reflect.KType
 internal fun <T, C> DataFrame<T>.requireImpl(column: ColumnSelector<T, C>, type: KType): DataFrame<T> {
     val resolvedColumn = getColumnWithPath(column)
     val actualType = resolvedColumn.data.type
-    kotlin.require(resolvedColumn.data.isSubtypeOf(type)) {
+    require(resolvedColumn.data.isSubtypeOf(type)) {
         "Column '${resolvedColumn.path.joinToString()}' has type '$actualType', which is not subtype of required '$type' type."
     }
     return this

docs/StardustDocs/topics/require.md

@@ -5,7 +5,7 @@ Throws an exception if the specified column is missing or its type is not subtyp
 From the compiler plugin perspective, a new column will appear in the compile-time schema as a result of this operation.
 The aim here is to help incrementally migrate workflows to extension properties API.
 
-However, this operation is new and will work in compiler plugin starting from IntelliJ IDEA 2026.2 and Kotlin 2.4.0
+Will work in compiler plugin starting from IntelliJ IDEA 2026.2 and Kotlin 2.4.0.
 
 ```text
 require { column }