Improved sync speed by resolving the N+1 query issues.
Solves #1402 and Solves #1453
With this change there is just one query done to retreive all the
important data, and matching is done in-code/memory.
With a very large database the sync time went down about 3 times.
Also updated misc crates and Github Actions versions.
This is a rather large PR which updates the async branch to have all the
database methods as an async fn.
Some iter/map logic needed to be changed to a stream::iter().then(), but
besides that most changes were just adding async/await where needed.
An incomplete 2FA login is one where the correct master password was provided,
but the 2FA token or action required to complete the login was not provided
within the configured time limit. This potentially indicates that the user's
master password has been compromised, but the login was blocked by 2FA.
Be aware that the 2FA step can usually still be completed after the email
notification has already been sent out, which could be confusing. Therefore,
the incomplete 2FA time limit should be long enough that this situation would
be unlikely. This feature can also be disabled entirely if desired.
