Register Qwen3 Embedding Presets to Kerashub

[laxmareddyp]

Description of the change

Reference

Colab Notebook

Checklist

• I have added all the necessary unit tests for my change.
• I have verified that my change does not break existing code and works with all backends (TensorFlow, JAX, and PyTorch).
• My PR is based on the latest changes of the main branch (if unsure, rebase the code).
• I have followed the Keras Hub Model contribution guidelines in making these changes.
• I have followed the Keras Hub API design guidelines in making these changes.
• I have signed the Contributor License Agreement.

[gemini-code-assist]

Summary of Changes

Hello @laxmareddyp, 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 integrates new Qwen3 text embedding model presets into Keras Hub. This expansion provides users with access to different scales of Qwen3 embedding models, each offering varying parameter counts and flexible embedding dimensions, thereby enhancing the platform's capabilities for diverse natural language processing tasks.

Highlights

• New Qwen3 Embedding Presets: Three new Qwen3 text embedding model presets have been added: qwen3_embedding_0.6b_en, qwen3_embedding_4b_en, and qwen3_embedding_8b_en.
• Model Specifications: These models feature a 32k context length and offer flexible, user-defined embedding dimensions, ranging from 32 to 1024 for the 0.6B model, 32 to 2560 for the 4B model, and 32 to 4096 for the 8B model.
• Parameter Counts: The added models have parameter counts of approximately 0.6 billion, 4 billion, and 8 billion respectively, providing a range of options for different use cases.

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[gemini-code-assist]

Code Review

This pull request adds three new presets for Qwen3 embedding models to qwen3_presets.py. While the structure of the new presets is consistent with existing ones in the file, the pull request is missing corresponding unit tests to validate that these new presets can be loaded and function correctly. The contribution guidelines for this repository state that testing is a mandatory part of any change. I have added a comment with a suggestion on how to add a test for the new presets.

[sachinprasadhs]

Update the conversion script as well, to review the changes made in conversion script to include these changes.

[laxmareddyp]

Update the conversion script as well, to review the changes made in conversion script to include these changes.

Will raise a Seperate PR for the same. Please merge this.