fix: update webhook endpoints to company-scoped /webhooks

- Change webhook URI from `/hooks` to `/webhooks` in APIResource
- Make NFe_Webhook methods company-scoped (matching ServiceInvoice pattern)
  - `create($companyId, $attributes)` instead of `create($attributes)`
  - `fetch($companyId, $webhookId)` instead of `fetch($key)`
  - `search($companyId, $options)` instead of `search($options)`

This aligns the PHP SDK with the Node.js SDK v3 where webhooks are
scoped under `/companies/{companyId}/webhooks/{webhookId}`.

The old global `/hooks/{id}` endpoint returns 404, causing webhook
operations to fail silently.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: ianchamba

lib/NFe/APIResource.php

@@ -23,7 +23,7 @@ public static function objectBaseURI() {
       case 'service_invoice':
         return 'serviceInvoices';
       case 'webhook':
-        return 'hooks';
+        return 'webhooks';
       default:
        return $object_type . 's';
     }

lib/NFe/Webhook.php

@@ -1,27 +1,50 @@
 <?php
 
 class NFe_Webhook extends NFe_APIResource {
-  public static function create( $attributes = array() ) {
+
+  /**
+   * Create a new webhook for a company.
+   *
+   * @param string $companyId  Company ID
+   * @param array  $attributes Webhook attributes (url, secret, events, status, contentType)
+   * @return NFe_Webhook|null
+   */
+  public static function create( $companyId, $attributes = array() ) {
+    $attributes['company_id'] = $companyId;
     return self::createAPI($attributes);
   }
 
-  public static function fetch( $key ) { 
-  	return self::fetchAPI($key); 
+  /**
+   * Fetch a specific webhook by company and webhook ID.
+   *
+   * @param string $companyId  Company ID
+   * @param string $webhookId  Webhook ID
+   * @return NFe_Webhook|null
+   */
+  public static function fetch( $companyId, $webhookId ) {
+    return self::fetchAPI( array( 'company_id' => $companyId, 'id' => $webhookId ) );
   }
 
-  public function save() { 
-  	return $this->saveAPI(); 
+  /**
+   * List all webhooks for a company.
+   *
+   * @param string $companyId Company ID
+   * @param array  $options   Search options
+   * @return NFe_SearchResult|array
+   */
+  public static function search( $companyId, $options = array() ) {
+    return self::searchAPI( array_merge( $options, array( 'company_id' => $companyId ) ) );
   }
 
-  public function delete() { 
-  	return $this->deleteAPI(); 
+  public function save() {
+    return $this->saveAPI();
   }
 
-  public function refresh() { 
-  	return $this->refreshAPI(); 
+  public function delete() {
+    return $this->deleteAPI();
   }
 
-  public static function search( $options = array() ) { 
-  	return self::searchAPI($options); 
+  public function refresh() {
+    return $this->refreshAPI();
   }
 }