Fix language query to fetch only based on codename

[benoit74]

Rationale

Probably due to an upstream change (in Babel ?), languages name and native properties are not up-to-date anymore in the DB. Code was not properly handling this situation, probably assuming these properties will never change.

Changes

• Language objects are fetched only based on their code
• Other language objects properties (name and native) are updated if they have changed

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (942be8e) 100.00% compared to head (ea51155) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #98   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           19        19           
  Lines          608       616    +8     
=========================================
+ Hits           608       616    +8     

Files	Coverage Δ
...end/src/backend/exporters/kiwix_public_exporter.py	100.00% <ø> (ø)
backend/src/backend/formatters/__init__.py	100.00% <ø> (ø)
backend/src/backend/formatters/kiwixlibraryxml.py	100.00% <ø> (ø)
backend/src/backend/models.py	100.00% <100.00%> (ø)
backend/src/backend/routes/books.py	100.00% <100.00%> (ø)
backend/src/backend/schemas.py	100.00% <ø> (ø)

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[rgaudin]

Makes sense ; thank you.
What's with the formatting changes?

[benoit74]

Regarding formatting, looks like black has changed some convention ^^

[rgaudin]

Regarding formatting, looks like black has changed some convention ^^

But the workflow checks for black on a pinned version…

[benoit74]

My fault, looks like I did not used the local version but my system one ...

[rgaudin]

Passed the QA check anyway 👍