feat: improve/correct handling of events and collections (backport #593)

[bradenmacdonald]

This backports #593 to Verawood and bumps the version to 1.0.2

Platform backport PR: openedx/openedx-platform#38695 - use this for testing once it's set to pull in this branch.

[openedx-webhooks]

Thanks for the pull request, @bradenmacdonald!

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