Set moderation_action to defer for moderators

this is apparently not automatic with Mailman 3

mailman_sync.py

@@ -123,6 +123,23 @@ def sync_moderators(
             list.remove_moderator(member.address.email)
 
 
+def fixup_moderation_actions(list: mailmanclient.MailingList, dry_run: bool):
+    expected_moderators = list.moderators
+    for member in list.members:
+        if member.address in expected_moderators:
+            moderation_action = "defer"
+        else:
+            moderation_action = ""
+
+        if member.moderation_action != moderation_action:
+            print(
+                f"Updating Moderation action for {member} ({member.moderation_action} -> {moderation_action}) in list {list}"
+            )
+            if not dry_run:
+                member.moderation_action = moderation_action
+                member.save()
+
+
 def update_cloudflare_lists(
     dry_run: bool,
     auth_token: str,
@@ -198,11 +215,12 @@ def main(
             print(f"Configuring/syncing {name}...")
             config_list(list, dry_run, **props["config"])
 
-        if "moderators" in props:
-            sync_moderators(list, dry_run, set(props["moderators"]))
         sync_members(
             list, dry_run, set(props["members"]) | set(props.get("moderators", []))
         )
+        if "moderators" in props:
+            sync_moderators(list, dry_run, set(props["moderators"]))
+            fixup_moderation_actions(list, dry_run)
 
     lists = [list.list_name.lower() for list in domain.get_lists()]
     update_cloudflare_lists(