[BUG] Metadata should be handle uninit'ed record segment.

[HammadB]

Description of changes

Summarize the changes made by this PR.

• Improvements & Bug fixes
  • Metadata merge should handle uninit'ed record segments by not reading the segment.
  • Add tracing on demand for debugging in metadata reader
• New functionality
  • None

Test plan

How are these changes tested?

• Tests pass locally with pytest for python, yarn test for js, cargo test for rust

Documentation Changes

None

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Name	Status	Preview	Comments	Updated (UTC)
chroma	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 14, 2024 5:24pm

[github-actions]

Reviewer Checklist

Please leverage this checklist to ensure your code review is thorough before approving

Testing, Bugs, Errors, Logs, Documentation

• Can you think of any use case in which the code does not behave as intended? Have they been tested?
• Can you think of any inputs or external events that could break the code? Is user input validated and safe? Have they been tested?
• If appropriate, are there adequate property based tests?
• If appropriate, are there adequate unit tests?
• Should any logging, debugging, tracing information be added or removed?
• Are error messages user-friendly?
• Have all documentation changes needed been made?
• Have all non-obvious changes been commented?

System Compatibility

• Are there any potential impacts on other parts of the system or backward compatibility?
• Does this change intersect with any items on our roadmap, and if so, is there a plan for fitting them together?

Quality

• Is this code of a unexpectedly high quality (Readability, Modularity, Intuitiveness)