wip: content-tree read path (reader.rs + shared struct_expr_from_schema)

[emkornfield]

🥞 Stacked PR

Use this link to review incremental changes.

• stack/content_tree_root [Files changed]
  • stack/content_tree_read [Files changed] ← this PR

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What changes are proposed in this pull request?

Co-authored-by: Isaac no-reply@databricks.com

How was this change tested?

[github-actions]

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Your title should start with feat:, fix:, chore:, docs:, perf:, refactor:, test:, or ci:, and if it's a breaking change that should be suffixed with a ! (like feat!:), and then a 1-72 character brief description of your change.

Title: wip: content-tree read path (reader.rs + shared struct_expr_from_schema)

[codecov]

Codecov Report

❌ Patch coverage is 94.03579% with 30 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.35%. Comparing base (d634b50) to head (9453a49).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
kernel/src/content_tree/reader.rs	94.17%	5 Missing and 8 partials ⚠️
kernel/src/content_tree/builder.rs	96.03%	4 Missing and 6 partials ⚠️
kernel/src/content_tree/mod.rs	74.07%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3292      +/-   ##
==========================================
+ Coverage   90.28%   90.35%   +0.06%     
==========================================
  Files         251      253       +2     
  Lines       88575    89178     +603     
  Branches    88575    89178     +603     
==========================================
+ Hits        79973    80574     +601     
+ Misses       5718     5697      -21     
- Partials     2884     2907      +23     

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