Returns the complete, authoritative catalog of webhook event types that a webhook endpoint can subscribe to.
Each entry's id field is the exact dotted/slashed string key (e.g. contact.updated, order.completed, orders/invoice.paid)
to supply verbatim in the event_type_ids array when creating or updating a webhook endpoint.
Fetch this list instead of guessing event type identifiers or consulting an external reference — this is the canonical source.
This endpoint is global (not scoped to a workspace) and requires a valid API token.