Create ml_checklist.md

Author: nguyentp

_posts/ml_checklist.md

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+---
+title: Machine Learning Checklist
+date: 
+tags: [ML, Checklist]
+render_with_liquid: false
+---
+
+## Requirements
+
+- At the Inference phrase, are all Features ready to use? 予測の時にモデルのすべてのインプットは準備できるか。