Place Subflow as a child in Execution History table

### Current design

<img width="1440" height="778" alt="Image" src="https://github.com/user-attachments/assets/857703aa-2451-4dfc-9df5-4579a5fc6c18" />

### [Figma](url) - Redesign

https://github.com/user-attachments/assets/b253218e-91e6-4406-8dff-97399c7768cc