Tabulator missing column docs

[drernie]

Description

TODO

• Documentation
  • run optipng on any new PNGs
  • Markdown somewhere in docs/**/*.md that explains the feature to end users (said .md files should be linked from SUMMARY.md so they appear on https://docs.quiltdata.com)

[greptile-apps]

PR Summary

Updated Tabulator documentation to clarify version requirements and document new features in v1.58, including support for missing columns and the $issue column functionality.

• Clarified platform version requirement to v1.55.0+ (changed from "stack version")
• Added documentation for new $issue column in v1.58 for tracking schema inconsistencies
• Updated schema consistency requirements to explain v1.58's missing columns support
• Documented that named capture groups can be extracted from both logical_key and package_name regex patterns

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 39.11%. Comparing base (61b45e8) to head (2defa26).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4302   +/-   ##
=======================================
  Coverage   39.11%   39.11%           
=======================================
  Files         783      783           
  Lines       34737    34737           
  Branches     5517     5517           
=======================================
  Hits        13586    13586           
  Misses      19970    19970           
  Partials     1181     1181           

Flag	Coverage Δ
api-python	91.39% <ø> (ø)
catalog	18.12% <ø> (ø)
lambda	91.48% <ø> (ø)

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