confusing messaging on template schedule settings page

<img width="941" alt="Image" src="https://github.com/user-attachments/assets/e6ecb175-4659-43c4-a124-3d8e5579196f" />

The header says hours but the error messages say `default_ttl_ms` must be an integer. 
Maybe we should change it to something like **The value should be an integer**.