Add type ep support

[dsarmany]

Description

Contributor Declaration

By opening this pull request, I affirm the following:

• All authors agree to the Contributor License Agreement.
• The code follows the project's coding standards.
• I have performed self-review and added comments where needed.
• I have added or updated tests to verify that my changes are effective and functional.
• I have run all existing tests and confirmed they pass.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 54.18%. Comparing base (0ce2f79) to head (87209a0).
⚠️ Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
...b/backend/deductions/significanceOfReferenceTime.h	0.00%	1 Missing ⚠️
src/metkit/mars2grib/frontend/time.cc	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #152   +/-   ##
========================================
  Coverage    54.18%   54.18%           
========================================
  Files          300      300           
  Lines        11564    11564           
  Branches      1025     1025           
========================================
  Hits          6266     6266           
  Misses        5298     5298           

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