Issue 1810 - Attenuation IO / Alternative 3

[lsawade]

Description

Alternative 2 for the attenuation IO this does not have tests yet. will add when approved

Issue Number

Close #1810

Checklist

Please make sure to check developer documentation on specfem docs.

• I ran the code through pre-commit to check style
• THE DOCUMENTATION BUILDS WITHOUT WARNINGS/ERRORS
• I have added labels to the PR (see right hand side of the PR page)
• My code passes all the integration tests
• I have added sufficient unittests to test my changes
• I have added/updated documentation for the changes I am proposing
• I have updated CMakeLists to ensure my code builds
• My code builds across all platforms

[codecov-commenter]

Codecov Report

❌ Patch coverage is 29.09761% with 385 lines in your changes missing coverage. Please review.
✅ Project coverage is 65.29%. Comparing base (a963913) to head (b7e0329).

Files with missing lines	Patch %	Lines
core/specfem/io/property/writer.tpp	28.75%	112 Missing and 2 partials ⚠️
...mpl/attenuation_medium/dim3/constant_isotropic.tpp	12.63%	83 Missing ⚠️
...mpl/attenuation_medium/dim2/constant_isotropic.tpp	11.36%	78 Missing ⚠️
core/specfem/io/property/reader.tpp	42.39%	52 Missing and 1 partial ⚠️
core/specfem/io/property/impl/coordinates.hpp	35.13%	21 Missing and 3 partials ⚠️
core/specfem/io/property/impl/sub_block.hpp	65.00%	14 Missing ⚠️
.../specfem/assembly/attenuation/dim2/attenuation.hpp	0.00%	5 Missing ⚠️
.../specfem/assembly/attenuation/dim3/attenuation.hpp	0.00%	5 Missing ⚠️
core/specfem/tag_dispatch/storage.hpp	50.00%	5 Missing ⚠️
core/specfem/assembly/assembly/dim2/assembly.cpp	0.00%	1 Missing and 1 partial ⚠️
... and 1 more

❌ Your patch status has failed because the patch coverage (29.09%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##            devel    #1996      +/-   ##
==========================================
- Coverage   66.32%   65.29%   -1.03%     
==========================================
  Files         589      591       +2     
  Lines       25809    26332     +523     
  Branches     2959     3026      +67     
==========================================
+ Hits        17117    17194      +77     
- Misses       7579     8021     +442     
- Partials     1113     1117       +4     

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