It forces programmers to think about errors we are logging and reporting
to the frontend, because they need to contain no sensitive data.

This contains only data, removes some Database dependency in imports.

This reverts commit f4284b4e.

This reverts commit efbe327f, reversing
changes made to 6d9bcd07.

We have contexts.hash_id which is enough (computed by postgres as a
trigger).

(no default getCurrentTime anymore)

Also, use ISO639 languages in some places.

This will show good progress bar.

Doesn't compile yet.

This is somewhere in Flow.hs in types for ConduitT () a m ()
where m monad is IO.

We don't need the IO monad there, just added a default date for
Duckling to make the parser.

Now the job doesn't return 'succeeded' fields when it actually fails.

This turned out to be quite heavy because of module import cycles.