add audit and validator components

[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

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 51.21%. Comparing base (7031200) to head (5636d49).
⚠️ Report is 7 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop      #70      +/-   ##
===========================================
+ Coverage    48.60%   51.21%   +2.60%     
===========================================
  Files           52       59       +7     
  Lines         2911     3050     +139     
===========================================
+ Hits          1415     1562     +147     
+ Misses        1496     1488       -8     

Files with missing lines	Coverage Δ
src/cdm_data_loader_utils/audit/checkpoint.py	100.00% <100.00%> (ø)
src/cdm_data_loader_utils/audit/metrics.py	100.00% <100.00%> (ø)
src/cdm_data_loader_utils/audit/rejects.py	100.00% <100.00%> (ø)
src/cdm_data_loader_utils/audit/run.py	100.00% <100.00%> (ø)
src/cdm_data_loader_utils/readers/dsv.py	95.34% <100.00%> (+14.39%)	⬆️
...ata_loader_utils/validation/dataframe_validator.py	100.00% <100.00%> (ø)
...data_loader_utils/validation/df_nullable_fields.py	100.00% <100.00%> (ø)
..._data_loader_utils/validation/validation_result.py	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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