Lmm/hook filter exception

[openedx-webhooks]

Thanks for the pull request, @morenol! I've created OSPR-5666 to keep track of it in JIRA, where we prioritize reviews. Please note that it may take us up to several weeks or months to complete a review and merge your PR.

Feel free to add as much of the following information to the ticket:

• supporting documentation
• Open edX discussion forum threads
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This is currently a draft pull request. When it is ready for our review and all tests are green, click "Ready for Review", or remove "WIP" from the title, as appropriate.

[openedx-webhooks]

@morenol Even though your pull request wasn’t merged, please take a moment to answer a two question survey so we can improve your experience in the future.