Use number formatting for token counts in debug log

Testing #301037

A bit of a nit, `Intl.NumberFormat` can be used here to add nice separators to token counts and such to make them more readable

<img width="278" height="86" alt="Image" src="https://github.com/user-attachments/assets/a0476f8c-c24b-4988-926a-91953b508ea1" />