I'm running an Express JS server and the Node JS chargebee client.
I decided to poll for Chargebee events using the `chargebee.event.list()` operation. I'm including all of the `subscription_*` events and I'm tracking the last timestamp to populate the `occurred_at[after]` value for incremental retrieval of the events.
I haven't been able to find any documentation about polling frequencies or limits. Are there any rate limits or best practices for this?