Apply same fix to scanForSubschemas method

Apply the same conditional check to scanForSubschemas to ensure consistency. This prevents definitions named 'enum' or 'const' from being skipped during subschema scanning.

Co-authored-by: DannyvdSluijs <618940+DannyvdSluijs@users.noreply.github.com>

Author: Copilot

src/JsonSchema/SchemaStorage.php

@@ -207,7 +207,8 @@ private function scanForSubschemas($schema, string $parentId): void
             $potentialSubSchemaId = $this->findSchemaIdInObject($potentialSubSchema);
             if (is_string($potentialSubSchemaId) && property_exists($potentialSubSchema, 'type')) {
                 // Enum and const don't allow id as a keyword, see https://github.com/json-schema-org/JSON-Schema-Test-Suite/pull/471
-                if (in_array($propertyName, ['enum', 'const'])) {
+                // Only skip if we're in an actual schema context, not when 'enum'/'const' is a property/definition name
+                if (in_array($propertyName, ['enum', 'const']) && $this->isSchemaObject($schema)) {
                     continue;
                 }