Community Library Notifications Filtering

[taoerman]

Summary

Renames date_resolved to Test Filtering And Search with database indexes for performance, adds FilterSet with date range and status filters plus channel name search, and makes resolved_by visible to editors.

References

Fixed #5456

Reviewer guidance

Run unit tests.

[AlexVelezLl]

Thanks @taoerman! It seems like there are some failing tests on the last commit. Could you take a look at it, please? Thanks!