Tests

custom messages: Support sending datetimes and bson.ObjectId #2412

Job	Run time
lint_typecheck_webui	1m 46s
flake8	17s
black	20s
Always - Docker verify, push to tag 'master' if on master	0s
mypy	19s
fail_fast_test_main	2m 43s
3.12	7m 13s
3.11	7m 12s
3.10	7m 17s
3.9	7m 7s
3.8	7m 23s
PyPI - Publish prerelease on merge commit on master	0s
Tagged - Docker push to tag based on git tag. Also push 'latest' if on master	0s
PyPI - Publish if this is a tagged commit	0s
	41m 37s

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