store 6CZJ.pdb in git repo

[atravitz]

resolves #1627

not my preferred permanent solution, but I think this is on-par with how we're handling several other pdbs.

Checklist

• Added a news entry

Developers certificate of origin

• I certify that this contribution is covered by the MIT License here and the Developer Certificate of Origin at https://developercertificate.org/.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.88%. Comparing base (53c16a8) to head (17e015c).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1634      +/-   ##
==========================================
- Coverage   95.33%   92.88%   -2.45%     
==========================================
  Files         183      183              
  Lines       15763    15762       -1     
==========================================
- Hits        15028    14641     -387     
- Misses        735     1121     +386     

Flag	Coverage Δ
fast-tests	92.88% <100.00%> (?)
slow-tests	?

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[mikemhenry]

Is the current error a dask weirdness?

[atravitz]

failing test will be resolved by #1633

[github-actions]

No API break detected ✅