The problem:
“3 days ago” should translate to “vor 3 Tagen” in German, while “3 days” translates to “3 Tage”. #21408 describes that django always translated to “Tage”, even when the dative “Tagen” was correct. The same applies to months (“Monate”/“Monaten”) and years (“Jahre”/“Jahren”).

The solution:
Let `timesince` caller provide the string dict to use for the time-related strings.

Thanks Tim Graham for the review.

Fixed #28913 -- Fixed error handling when MIGRATIONS_MODULES specifies a nonexistent top-level package.

* Added logging of 500 responses for instantiated responses.
* Added logging of all 4xx and 5xx responses.

Thanks Tim Graham and Mariusz Felisiak for the reviews.

Fixed #29367 -- Fixed model state on objects with a primary key created with QuerySet.bulk_create().

COUNT is more expensive than EXISTS; use the latter when possible.

Instead of loading all QuerySet results in memory, count the number of
entries. This adds an extra query when list() or tuple() is called on the
choices (because both call __len__() then __iter__()) but uses less
memory since the QuerySet results won't be cached. In most cases, the
choices will only be iterated on, meaning that __len__() won't be called
and only one query will be executed.

Thanks Tim Graham for the fix.