Variable FUNCTION_EVENT_TYPESConst

Every event topic a Contentful Function can accept, as a plain array of string values.

Derived from FunctionTypeEnum so the two cannot drift: consumers that need the values as data (to build a JSON Schema enum, or to check membership) read them from here, and consumers that need a named topic keep referencing the enum member.

Typed as FunctionEventTopic, not as the enum, so a schema built by mapping over these values describes plain strings — matching the data that actually arrives over the wire.