fix(tsv): Check explicit formats for column contents when defined

[effigies]

Resolves a discrepancy between legacy and schema validator. We had been previously validating the type of entries in columns, but not the stated formats, when present.

We now give preference to an explicit format over type checking.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.21%. Comparing base (56734ab) to head (bdf0f4b).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2025      +/-   ##
==========================================
+ Coverage   85.75%   87.21%   +1.45%     
==========================================
  Files          91      132      +41     
  Lines        3785     6320    +2535     
  Branches     1218     1526     +308     
==========================================
+ Hits         3246     5512    +2266     
- Misses        453      717     +264     
- Partials       86       91       +5     

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