Minor SQLOperator fix

[fritz-astronomer]

• fix: allow SqlOperator to take a list of commands

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.25%. Comparing base (b3ee237) to head (641f78c).
Report is 15 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #41      +/-   ##
==========================================
- Coverage   78.92%   76.25%   -2.68%     
==========================================
  Files          35       38       +3     
  Lines        1362     1579     +217     
==========================================
+ Hits         1075     1204     +129     
- Misses        287      375      +88     

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