[Bitbucket] Robust datetime parsing for commit dates (#1589)

[PR-HARIHARAN]

This PR fixes a datetime parsing issue when reading Bitbucket Cloud commit
dates that include both an explicit timezone and a trailing 'Z', e.g.

2025-09-18T21:26:38+00:00Z

Such values previously caused a ValueError when accessed via Commit.date.

Related issue: #1589

Files changed

• Modified: atlassian/bitbucket/base.py

  • Improve get_time() to normalize timestamps that contain a timezone
    followed by an extraneous trailing Z, handle Python <3.7 %z colon
    differences, and attempt multiple sensible datetime formats before
    falling back.

• Added: tests/test_bug_reproduction.py

  • Unit reproduction test that asserts a Commit built with
    "2025-09-18T21:26:38+00:00Z" returns a parsed value via .date.

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 41.97%. Comparing base (f5c0afa) to head (a218359).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
atlassian/bitbucket/base.py	66.66%	1 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1591      +/-   ##
==========================================
- Coverage   42.24%   41.97%   -0.28%     
==========================================
  Files          66       66              
  Lines        8588     8541      -47     
  Branches     1036     1041       +5     
==========================================
- Hits         3628     3585      -43     
- Misses       4820     4821       +1     
+ Partials      140      135       -5     

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