Run dataset tests on Woodpecker with full data access

[mdekstrand]

This adds a Woodpecker CI job with locally-cached access to datasets for more thorough testing.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.57%. Comparing base (024fc7b) to head (1821af3).
⚠️ Report is 11 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1181      +/-   ##
==========================================
- Coverage   89.58%   89.57%   -0.02%     
==========================================
  Files         262      262              
  Lines       17405    17405              
==========================================
- Hits        15593    15590       -3     
- Misses       1812     1815       +3     

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