See https://github.com/mozilla/bleach/issues/698

nh3 is a small wrapper around https://crates.io/crates/ammonia - more
Rust code in Fietsboek! \o/

The default seems to be to strip unknown tags instead of replace them
with htmlentities, which is fine. Then the <script> tags are completely
gone.

Python seems to do fine, but pylint complains (probably rightfully,
since the tests do not represent packages). We lose type hinting for the
playwright_helper, but there's probably a better way to do it in the
future.

They caused issues because they might not have created the database
tables or the data directory. Since the cleanup job runs globally after
every test, it should take that into consideration and not error out.

I'd like to have more, but this is a start (and already caught some
errors, see the last two commits).

It was ovious that this is broken when you try to round "0s" to
second-level granularity, and you end up with "1s". The problem comes
from the fact that we use the integer divison when checking whether we
should round up or down, but then also use strict inequality.

To fix this, we now also round down if the second_offset is equal to the
halfway point (which in the case of second-level granularity is 0).

We basically do the same hacky trick in two different places, so maybe
we should put it into a separate function, test it, and if a better
implementation arises, swap it.

Currently, the test seems flaky on CI due to

    playwright._impl._api_types.Error: Clicking the checkbox did not
    change its state

Maybe this is the change that will fix it?

This gets the intent across clearer