(pivot table): bad typing on dimensions and measures

### Description

<img width="1188" height="1036" alt="Image" src="https://github.com/user-attachments/assets/261bb263-4d81-4647-81a2-7df0c2698b2a" />

=> this leads to bad compile-time unsafe code like this

<img width="498" height="143" alt="Image" src="https://github.com/user-attachments/assets/6bf2dacd-f406-4d36-ac13-2573e432bfc6" />