Fix parameter validation to reject over-limit values instead of clamping (#94)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: moltude <1419766+moltude@users.noreply.github.com>

Author: Copilot

src/main/scala/dpla/api/v2/search/paramValidators/ParamValidator.scala

@@ -499,7 +499,7 @@ trait ParamValidator extends FieldDefinitions {
     Try(intString.toInt).toOption match {
       case Some(int) =>
         if (int < min) throw ValidationException(rule)
-        else if (int > max) max
+        else if (int > max) throw ValidationException(rule)
         else int
       case None =>
         // not an integer