Enforce squashing while merging PRs

Author: vy

.asf.yaml

@@ -53,6 +53,13 @@ github:
     - api
     - syslog
 
+  # Enforce squashing while merging PRs.
+  # Otherwise, the git log gets polluted severely.
+  enabled_merge_buttons:
+    squash:  true
+    merge:   false
+    rebase:  false
+
   protected_branches:
     main:
       required_signatures: true