fix(typing): Annotate pipe first argument type as GT

[FBruzzesi]

Summary

Very tiny change: func callable in pipe function was missing the first argument annotation, leading to the following:

Return type is unknownPylance[reportUnknownVariableType]

Expected 0 positional arguments

screenshot

By adding "GT" via Concatenate, the issue is resolved.

Checklist

• I understand and agree to the Code of Conduct.
• I have followed the Style Guide for Python Code as best as possible for the submitted code.
• I have added pytest unit tests for any new functionality.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.43%. Comparing base (bf2ae77) to head (4055dcc).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #757   +/-   ##
=======================================
  Coverage   91.43%   91.43%           
=======================================
  Files          47       47           
  Lines        5547     5547           
=======================================
  Hits         5072     5072           
  Misses        475      475           

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