fix: fix angstrom enum

[tlambert03]

fixes #295 ...

cause:
xsdata 24.4 introduced a change in xsdata/codegen/models.py in the Attr.__post_init__ method:

  # xsdata 24.2.1 (old - works):
  def __post_init__(self):
      self.local_name = self.name

  # xsdata 24.4+ (new - breaks):
  def __post_init__(self):
      if not self.local_name:
          self.local_name = self.name

      if text.alnum(self.name) == "":
          self.name = "_".join(unicodedata.name(char) for char in self.name)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.62%. Comparing base (83ce006) to head (4617545).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #296   +/-   ##
=======================================
  Coverage   95.62%   95.62%           
=======================================
  Files          24       24           
  Lines        1120     1120           
=======================================
  Hits         1071     1071           
  Misses         49       49           

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[codspeed-hq]

CodSpeed Performance Report

Merging #296 will not alter performance

_{Comparing fix-angstrom (4617545) with main (83ce006)}

Summary

✅ 9 untouched