Files with additional date information


I’m a developer trying to add functionality for file uploads with a start and end date that can be chosen while uploading.
This should show old files as deprecated by crossing the name out (but still allowing to download) and not showing files dated for the future yet.

I’m not quite sure what would be the best way to approach this.
Is it possible to add a new kind of bottom tab like attachments that is based on the original attachments?
Would it be feasible to create an app that offers this function and link to it from another page?
Can I alter the functionality of the core attachment funtion?

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