[EC2 Instance] Naming convention

Current:

`{user_input}-swarm`
<img width="360" alt="image" src="https://github.com/user-attachments/assets/dd13594c-d896-4be6-9a93-9218dcf8b7d7">

New:

`s-{user_input}`

Example:

`s-Health`

**Acceptance Criteria**

- [ ] Core naming convention going forward