chore: Use lazy evaluated annotations

[nijel]

Proposed changes

Utilize PEP 563: Postponed evaluation of annotations

Checklist

• Lint and unit tests pass locally with my changes.
• I have added tests that prove my fix is effective or that my feature works.
• I have added documentation to describe my feature.
• I have squashed my commits into logic units.
• I have described the changes in the commit messages.

Other information

[codecov]

Codecov Report

Merging #9550 (636894a) into main (c53a67b) will decrease coverage by 0.01%.
The diff coverage is 92.40%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9550      +/-   ##
==========================================
- Coverage   90.99%   90.98%   -0.01%     
==========================================
  Files         732      733       +1     
  Lines       54429    54468      +39     
  Branches     8390     8393       +3     
==========================================
+ Hits        49526    49559      +33     
- Misses       3403     3406       +3     
- Partials     1500     1503       +3     

Impacted Files	Coverage Δ
weblate/utils/lock.py	77.35% <42.10%> (+1.35%)	⬆️
weblate/trans/models/component.py	80.91% <50.00%> (-0.13%)	⬇️
weblate/trans/models/translation.py	87.15% <50.00%> (-0.21%)	⬇️
weblate/vcs/mercurial.py	91.58% <75.00%> (-0.87%)	⬇️
weblate/vcs/base.py	92.22% <85.71%> (-0.69%)	⬇️
weblate/vcs/git.py	84.94% <93.10%> (-0.19%)	⬇️
weblate/accounts/models.py	88.61% <100.00%> (ø)
weblate/accounts/notifications.py	96.31% <100.00%> (+<0.01%)	⬆️
weblate/accounts/tests/test_notifications.py	100.00% <100.00%> (ø)
weblate/accounts/tests/test_utils.py	100.00% <100.00%> (ø)
... and 56 more

... and 2 files with indirect coverage changes