[CT-2026] Add proto serialization to automated event testing

[jtcohen6]

Let's extend this test, so it validates serialization to proto (and thereby our proto schema definitions) in addition to JSON:

dbt-core/tests/unit/test_events.py

Lines 391 to 417 in b2ea2b8

	class TestEventJSONSerialization:
	# attempts to test that every event is serializable to json.
	# event types that take `Any` are not possible to test in this way since some will serialize
	# just fine and others won't.
	def test_all_serializable(self):
	all_non_abstract_events = set(
	get_all_subclasses(BaseEvent),
	)
	all_event_values_list = list(map(lambda x: x.__class__, sample_values))
	diff = all_non_abstract_events.difference(set(all_event_values_list))
	assert (
	not diff
	), f"test is missing concrete values in `sample_values`. Please add the values for the aforementioned event classes"
	# make sure everything in the list is a value not a type
	for event in sample_values:
	assert type(event) != type
	# if we have everything we need to test, try to serialize everything
	for event in sample_values:
	msg = msg_from_base_event(event)
	msg_dict = msg_to_dict(msg)
	try:
	msg_json = msg_to_json(msg)
	except Exception as e:
	raise Exception(f"{event} is not serializable to json. Originating exception: {e}")

[emmyoop]

• Need to set more values in the test events (dictionaries)
• New test may surface errors that will need to be fixed

Time box this for now, and if there's more work to do create another ticket.