Downgrade log severity for failure to enum. overwrites on Channel Update

Also skips removing the event from the list of pending events, so that it is retried on the next task run

Author: FloatingMilkshake

Tasks/EventTasks.cs

@@ -134,6 +134,10 @@ await Program.db.HashSetAsync("overrides",
                         PendingChannelUpdateEvents.Remove(timestamp);
                         success = true;
                     }
+                    catch (InvalidOperationException ex)
+                    {
+                        Program.discord.Logger.LogDebug(ex, "Failed to enumerate channel overwrites for channel {channel}; this usually means the permissions were changed while processing a channel event. Will try again on next task run.", e.ChannelAfter.Id);
+                    }
                     catch (Exception ex)
                     {
                         // Log the exception