Add GEM Transform

[eva-1729]

Description

Simple script transform for GEM, subject to changes with script editing from IS

[codecov]

Codecov Report

❌ Patch coverage is 18.60465% with 35 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.97%. Comparing base (8dc23ec) to head (19d043f).

Files with missing lines	Patch %	Lines
fia_api/scripts/transforms/gem_transform.py	15.00%	34 Missing ⚠️
fia_api/scripts/transforms/factory.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #653      +/-   ##
==========================================
- Coverage   96.53%   94.97%   -1.56%     
==========================================
  Files          49       50       +1     
  Lines        2108     2151      +43     
==========================================
+ Hits         2035     2043       +8     
- Misses         73      108      +35     

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