Bugfix/Chroma Metadata

[HenryHengZJ]

update Chroma metadata handling with sanitization function

[gemini-code-assist]

Summary of Changes

Hello @HenryHengZJ, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request implements a bug fix for Chroma metadata handling by introducing a dedicated sanitization function. The new function ensures that all metadata conforms to ChromaDB's supported types, converting non-primitive values into JSON strings. This update improves the overall compatibility and robustness of the Chroma vector store integration.

Highlights

• Metadata Sanitization: A new sanitizeMetadata function has been introduced to process all metadata before it is sent to ChromaDB, ensuring type compatibility.
• Type Compatibility: Complex metadata types such as arrays and objects are now automatically JSON stringified to comply with ChromaDB's requirement for primitive metadata values (boolean, number, string, null).
• Improved Robustness: This change enhances the stability and reliability of Chroma vector store operations by preventing invalid metadata from causing issues.

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[gemini-code-assist]

Code Review

This pull request introduces a sanitization function for Chroma metadata to handle unsupported data types. The overall approach is good, but the new sanitizeMetadata function has a bug where it can produce undefined values, which violates Chroma's metadata type constraints. I've provided a detailed comment with a suggested fix to make the sanitization more robust and prevent potential runtime errors.