feat: [DatabaseCenter] Adding Method AggregateIssueStats of Database Center API v1beta (#8865)

* feat: Adding Method AggregateIssueStats of Database Center API v1beta

This release includes:
-   `DatabaseCenter` service with `AggregateIssueStats` method.
-   All related enums.

PiperOrigin-RevId: 856484579

Source-Link: googleapis/googleapis@615bb9a

Source-Link: googleapis/googleapis-gen@6428854
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DatabaseCenter/metadata/V1Beta/Service.php

@@ -0,0 +1,78 @@
+<?php
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * GENERATED CODE WARNING
+ * This file was automatically generated - do not edit!
+ */
+
+require_once __DIR__ . '/../../../vendor/autoload.php';
+
+// [START databasecenter_v1beta_generated_DatabaseCenter_AggregateIssueStats_sync]
+use Google\ApiCore\ApiException;
+use Google\Cloud\DatabaseCenter\V1beta\AggregateIssueStatsRequest;
+use Google\Cloud\DatabaseCenter\V1beta\AggregateIssueStatsResponse;
+use Google\Cloud\DatabaseCenter\V1beta\Client\DatabaseCenterClient;
+
+/**
+ * AggregateIssueStats provides database resource issues statistics.
+ *
+ * @param string $parent Parent can be a project, a folder, or an organization. The search
+ *                       is limited to the resources within the `scope`.
+ *
+ *                       The allowed values are:
+ *
+ *                       * projects/{PROJECT_ID} (e.g., "projects/foo-bar")
+ *                       * projects/{PROJECT_NUMBER} (e.g., "projects/12345678")
+ *                       * folders/{FOLDER_NUMBER} (e.g., "folders/1234567")
+ *                       * organizations/{ORGANIZATION_NUMBER} (e.g., "organizations/123456")
+ */
+function aggregate_issue_stats_sample(string $parent): void
+{
+    // Create a client.
+    $databaseCenterClient = new DatabaseCenterClient();
+
+    // Prepare the request message.
+    $request = (new AggregateIssueStatsRequest())
+        ->setParent($parent);
+
+    // Call the API and handle any network failures.
+    try {
+        /** @var AggregateIssueStatsResponse $response */
+        $response = $databaseCenterClient->aggregateIssueStats($request);
+        printf('Response data: %s' . PHP_EOL, $response->serializeToJsonString());
+    } catch (ApiException $ex) {
+        printf('Call failed with message: %s' . PHP_EOL, $ex->getMessage());
+    }
+}
+
+/**
+ * Helper to execute the sample.
+ *
+ * This sample has been automatically generated and should be regarded as a code
+ * template only. It will require modifications to work:
+ *  - It may require correct/in-range values for request initialization.
+ *  - It may require specifying regional endpoints when creating the service client,
+ *    please see the apiEndpoint client configuration option for more details.
+ */
+function callSample(): void
+{
+    $parent = '[PARENT]';
+
+    aggregate_issue_stats_sample($parent);
+}
+// [END databasecenter_v1beta_generated_DatabaseCenter_AggregateIssueStats_sync]