Track dedupe index file size in org storage stats

[tw4l]

Fixes #3206

Backend changes

• Adds size of dedupe index files to org storage stats
• Removes bytes from org storage stats when dedupe index is deleted if file was saved
• Adds new stats to org metrics endpoint
• Adds await that was missing in method for updating index state
• Updates (and fixes) test for org metrics endpoint

Frontend changes

• Includes dedupe index files in Misc storage in dashboard storage meter
• Updates type for org metrics

[ikreymer]

whoa, i'm surprised this was missed before by mypy, and no warnings about it either?

[tw4l]

I think it's because there's no return to check the type of. mypy doesn't seem to be making sure that async methods are awaited generally, at least with how we set it up.

[tw4l]

Seems to be a contentious issue over in the mypy repo issues: python/mypy#2499

[tw4l]

This might require some changes in our codebase (there are lots of places where we await without doing anything with the return value of async methods) but this could help: https://mypy.readthedocs.io/en/stable/error_code_list2.html#check-that-awaitable-return-value-is-used-unused-awaitable

[ikreymer]

Hm, this may have more unintended consequence, does adding a return type help generally?

[tw4l]

Had to resolve some merge conflicts rebasing on main but should be set for re-review now

[ikreymer]

Looks good! Thanks for additional type fixes as well!