fix: support numpy 2.x for compatibility with markitdown (Issue #548)

[yang1002378395-cmyk]

Summary

• Update numpy constraint from ^1.26.0 to >=1.26.0,<3.0.0
• Allows installation of markitdown 0.1.4+ which requires numpy >= 2.1.0 via magika dependency
• Resolves [Feature Request] Support numpy >= 2.0 for compatibility with markitdown #548

Background

Users reported dependency conflict when trying to use the latest markitdown (0.1.4+):

Because sample-standard-app depends on agentuniverse (0.0.19) which depends on numpy (>=1.26.0,<2.0.0), numpy is required. So, because sample-standard-app depends on numpy (>=2.1.0), version solving failed.

Compatibility Analysis

Checked all numpy usage in codebase:

• faiss_store.py - Uses basic numpy array operations (compatible with 2.x)
• readimage_tool.py - Uses cv2, PIL, numpy array ops (compatible with 2.x)
• doubao_embedding.py - Uses basic numpy (compatible)
• image_reader.py - Uses basic numpy (compatible)

All numpy usage patterns in the codebase are compatible with numpy 2.x.

Testing

• ✅ No breaking API changes in numpy 2.x for the functions used
• ✅ faiss-cpu supports numpy 2.x
• ✅ pandas, pyarrow dependencies also support numpy 2.x

Checklist

• Code changes tested locally
• No breaking changes to existing functionality
• Commit message follows conventional commits