Fix: Prevent AttributeError in 03_eda_demo.py health check#15

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xx-devvv wants to merge 2 commits intoProgrammers-Paradise:mainfrom

xx-devvv:fix-demo3-health-check

Commits on Jan 24, 2026

Fix: Prevent crash in 01_data_io_demo.py when pyarrow is missing
xx-devvv
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Fix: Handle float return type in demo_health_check to prevent AttributeError
xx-devvv
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