Add config for commit signing (#2623)

* add config for commit signing

* Regenerate client from commit 065a04e5 of spec repo

---------

Co-authored-by: Sherzod Karimov <sherzod.karimov@datadoghq.com>
Co-authored-by: ci.datadog-api-spec <packages@datadoghq.com>

Author: 3 people

.apigentools-info

@@ -4,13 +4,13 @@
     "spec_versions": {
         "v1": {
             "apigentools_version": "1.6.6",
-            "regenerated": "2025-06-11 14:29:03.491775",
-            "spec_repo_commit": "847bdb30"
+            "regenerated": "2025-06-12 17:39:44.255214",
+            "spec_repo_commit": "065a04e5"
         },
         "v2": {
             "apigentools_version": "1.6.6",
-            "regenerated": "2025-06-11 14:29:03.513770",
-            "spec_repo_commit": "847bdb30"
+            "regenerated": "2025-06-12 17:39:44.270647",
+            "spec_repo_commit": "065a04e5"
         }
     }
 }

repository.datadog.yaml

@@ -4,3 +4,11 @@ kind: stale-branches
 max_age: 2920h # 4 months
 excludes:
   - gh-pages
+---
+schema-version: v1
+kind: mergegate
+rules:
+  - require: commit-signatures
+    excluded_emails:
+      - "41898282+github-actions[bot]@users.noreply.github.com" # github-actions[bot]
+      - "packages@datadoghq.com" # ci.datadog-api-spec bot we use to commit changes