[Bug][Spark]: The vertex writer does not generate vertex num file when writing a vertex dataFrame

[acezen]

Is there an existing issue for this?

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Current Behavior

When writing a vertex DataFrame by VertexWriter, the vertex_count file of GAR file format has not been generated by vertex writer. That's not the expected behavior.

Expected Behavior

Generated the vertex_count file as designed.

Minimal Reproducible Example

Could use "test vertex writer with only vertex table" case of TestWriter

Environment

• Operating system:
• GraphAr version:

Link to GraphAr Logs

No response

Further Information

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