feat: integrate FingersCrossedHandler

In situation, when we don't collect verbose logs, but we still may be
interested in any errors occurring on client's website and being able to
investigate those after gaining access, we may make use of
`action_level` option in `SimpleLoggerFactory`.

With this option set to some level, we configure `FingersCrossedHandler`
which will ensure, when action level is hit, all log stack is persisted.

Signed-off-by: Bart Jaskulski <bjaskulski@protonmail.com>