Add support for lowercase id key

Author: Algonexys

.tasks/538/plan.md

@@ -602,10 +602,14 @@ the single `update()` method) — document this in the method docblock.
 parameter in batch commands, but `Core\Batch::deleteEntityItems()` sends uppercase `ID` — confirmed
 by a live batch-delete integration test failure (`could not find value for parameter {id}`). Fixed
 by adding `src/Services/Catalog/ProductProperty/Batch.php extends \Bitrix24\SDK\Core\Batch`,
-overriding `deleteEntityItems()` to send `['id' => $itemId]`, following the exact
-`Services\Task\Batch`/`Services\CRM\Currency\Batch` pattern. Wired into
-`CatalogServiceBuilder::productProperty()` by constructing `new Catalog\ProductProperty\Batch($this->core, $this->log)`
-instead of reusing the shared `$this->batch`, matching `CRMServiceBuilder::currency()`.
+overriding `deleteEntityItems()` to send `['id' => $itemId]`. Also overrides
+`determineKeyId()` to return lowercase `'id'`, matching the more recent reference implementation
+`Services\Biconnector\Connector\Batch`/`Services\Biconnector\Source\Batch` (which additionally
+override list pagination for a `page`-based method — not needed here since
+`catalog.productProperty.list` uses standard `start`-based pagination, so only `deleteEntityItems()`
+and `determineKeyId()` are overridden). Wired into `CatalogServiceBuilder::productProperty()` by
+constructing `new Catalog\ProductProperty\Batch($this->core, $this->log)` instead of reusing the
+shared `$this->batch`, matching `CRMServiceBuilder::currency()`.
 
 No separate `ProductPropertyServiceBuilder.php` file is needed — `ProductProperty` is registered
 directly inside the existing `src/Services/Catalog/CatalogServiceBuilder.php` (see Files to Modify

src/Services/Catalog/ProductProperty/Batch.php

@@ -21,10 +21,24 @@
 /**
  * Class Batch
  *
+ * Overrides base Batch to handle a parameter naming difference in catalog.productProperty.* REST
+ * methods: delete uses lowercase 'id' instead of 'ID'.
+ *
+ * @see https://apidocs.bitrix24.com/api-reference/catalog/product-property/catalog-product-property-delete.html
+ *
  * @package Bitrix24\SDK\Services\Catalog\ProductProperty
  */
 class Batch extends \Bitrix24\SDK\Core\Batch
 {
+    /**
+     * Determines the ID key — lowercase 'id' for catalog product property
+     */
+    #[\Override]
+    protected function determineKeyId(string $apiMethod, ?array $additionalParameters): string
+    {
+        return 'id';
+    }
+
     /**
      * Delete entity items with batch call
      *