Add in downloaders

[ialarmedalien]

Description of PR purpose/changes

• Please include a summary of the change and which issue is fixed.
• Please also include relevant motivation and context.
• List any dependencies that are required for this change.

Testing Instructions

• Details for how to test the PR:

• Tests pass locally and in GitHub Actions

Dev Checklist:

• My code follows the guidelines at https://sites.google.com/lbl.gov/trussresources/home?authuser=0
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have run Ruff format to format my code
• I have run Ruff check and fixed any errors that it uncovered
• Any dependent changes have been merged and published in downstream modules

Updating Version and Release Notes (if applicable)

• Version has been bumped for each release.
• README has been updated for each release.

[codecov]

Codecov Report

❌ Patch coverage is 90.68323% with 30 lines in your changes missing coverage. Please review.
✅ Project coverage is 48.60%. Comparing base (b3d8269) to head (7031200).
⚠️ Report is 8 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/cdm_data_loader_utils/utils/cdm_logger.py	76.31%	9 Missing ⚠️
src/cdm_data_loader_utils/readers/dsv.py	80.95%	8 Missing ⚠️
src/cdm_data_loader_utils/utils/helpers.py	0.00%	7 Missing ⚠️
src/cdm_data_loader_utils/utils/gz.py	89.74%	4 Missing ⚠️
src/cdm_data_loader_utils/audit/schema.py	94.44%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop      #69      +/-   ##
===========================================
+ Coverage    43.78%   48.60%   +4.82%     
===========================================
  Files           42       52      +10     
  Lines         2592     2911     +319     
===========================================
+ Hits          1135     1415     +280     
- Misses        1457     1496      +39     

Files with missing lines	Coverage Δ
src/cdm_data_loader_utils/core/constants.py	100.00% <100.00%> (ø)
src/cdm_data_loader_utils/core/pipeline_run.py	100.00% <100.00%> (ø)
...m_data_loader_utils/utils/download/async_client.py	100.00% <100.00%> (ø)
src/cdm_data_loader_utils/utils/download/core.py	100.00% <100.00%> (ø)
...dm_data_loader_utils/utils/download/sync_client.py	100.00% <100.00%> (ø)
src/cdm_data_loader_utils/utils/spark_delta.py	82.41% <100.00%> (-0.20%)	⬇️
src/cdm_data_loader_utils/audit/schema.py	94.44% <94.44%> (ø)
src/cdm_data_loader_utils/utils/gz.py	89.74% <89.74%> (ø)
src/cdm_data_loader_utils/utils/helpers.py	0.00% <0.00%> (ø)
src/cdm_data_loader_utils/readers/dsv.py	80.95% <80.95%> (ø)
... and 1 more

... and 1 file with indirect coverage changes

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