fix(scopes): add missing existing scope

[GG-HH]

Scope can be defined but is lot listed here, leading to tokens with this permission to fail.

I am wondering how we could make sure this is synced with the definitions of the labels or get rid of the definitions here.

---

Note

Adds missing PUBLIC_PERIMETER_VIEW (public-perimeter:read) to TokenScope and updates changelog.

• Models:
  • Extend TokenScope in pygitguardian/models.py with PUBLIC_PERIMETER_VIEW (public-perimeter:read).
• Changelog:
  • Add fragment noting fix for missing scope causing validation errors.

^{Written by Cursor Bugbot for commit 11aa579. This will update automatically on new commits. Configure here.}

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.62%. Comparing base (684332d) to head (11aa579).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #155   +/-   ##
=======================================
  Coverage   95.62%   95.62%           
=======================================
  Files           5        5           
  Lines        1234     1235    +1     
=======================================
+ Hits         1180     1181    +1     
  Misses         54       54           

Flag	Coverage Δ
unittests	95.62% <100.00%> (+<0.01%)	⬆️

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