Add GitHub Actions for running SQLAlchemy tests

[methane]

[codecov[bot]]

Codecov Report

Merging #518 (bb02b2d) into main (267e784) will increase coverage by 0.51%. The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #518      +/-   ##
==========================================
+ Coverage   85.71%   86.22%   +0.51%     
==========================================
  Files           6        6              
  Lines         539      559      +20     
==========================================
+ Hits          462      482      +20     
  Misses         77       77              

Impacted Files	Coverage Δ
MySQLdb/_exceptions.py	100.00% <0.00%> (ø)

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