This:
- Move version parsing logic from loader-gnu to lister
- Parse the timestamps provided by gnu to an isoformat date
- (Aligns the timestamps stored in the lister model to be also a date in the right format to clarify reading from it)
This allows to have a generic "tar" loader
That way, the loader expects some required arguments in the right type already.
No need for it to try and do specific computations depending on the origin of the archives.
Related D2145
Note:
This actually implies a schema migration (timestamp model migration)
As the loader gnu never ran though, we might as well drop the existing data and trigger a new run when time comes.
So it's not a blocker.