fix: unwrap operators of cell operations

[lars-reimann]

Summary of Changes

Always unwrap the right operators of cell operations. This was missing in some cases, leading to runtime errors akin to

cannot create expression literal for value of type _LazyCell: <Expr ['[(col("Shortness of breath on …'] at 0x18E78C3E010>

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	black	18	0	0	1.19s
✅ PYTHON	mypy	18		0	3.03s
✅ PYTHON	ruff	18	0	0	0.36s
✅ REPOSITORY	git_diff	yes		no	0.57s

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.43%. Comparing base (fdd971a) to head (b185a29).
Report is 25 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #932   +/-   ##
=======================================
  Coverage   94.42%   94.43%           
=======================================
  Files         121      121           
  Lines        7465     7473    +8     
=======================================
+ Hits         7049     7057    +8     
  Misses        416      416           

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[lars-reimann]

🎉 This PR is included in version 0.28.1 🎉

The release is available on:

• v0.28.1
• GitHub release

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