fix(drivers-event-listener-griptape-cloud): add type/timestamp fallbacks for custom events

[collindutter]

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Describe your changes

Problem:

Users can publish custom events by passing a dict to publish_event:

griptape/griptape/drivers/event_listener/base_event_listener_driver.py

Lines 30 to 31 in d15b2a6

	def publish_event(self, event: BaseEvent | dict) -> None:
	event_payload = event if isinstance(event, dict) else event.to_dict()

GriptapeCloudEventListenerDriver makes assumptions about what these events will contain:

griptape/griptape/drivers/event_listener/griptape_cloud_event_listener_driver.py

Lines 72 to 77 in 7af49da

	def _get_event_request(self, event_payload: dict) -> dict:
	return {
	"payload": event_payload,
	"timestamp": event_payload["timestamp"],
	"type": event_payload["type"],
	}

Solution:

Add fallbacks for these keys:

griptape/griptape/drivers/event_listener/griptape_cloud_event_listener_driver.py

Lines 73 to 78 in d15b2a6

	def _get_event_request(self, event_payload: dict) -> dict:
	return {
	"payload": event_payload,
	"timestamp": event_payload.get("timestamp", time.time()),
	"type": event_payload.get("type", "UserEvent"),
	}

Issue ticket number and link

NA

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