Sync is not working properly

### Quick summary

Hello.
We have an issue with the sync.
The site sync starts and it gets frozen in "Initializing remote backup" ( the progress bar is frozen at around 20% and it didn't move for around 6 hours).
Any way around this issue?
Pressable staging site (around 14 Gb in size), all accounts connected.
Latest version of the Studio.
Mac OSX 15.7.7
Mac Mini Intel i7.

Thanks,
Dushan.

### Steps to reproduce

1. Start the app
2. Add site
3. Site sync starts and it gets frozen

### What you expected to happen

Obviously, I expect to have a bug-free app and basic functionality, like sync, in working order.

### What actually happened

Pressable site sync is taking forever (progress bar didn't move for 6 hours), I suspect it is frozen.

### Impact

One

### Available workarounds?

No and the app is unusable

### Platform

_No response_

### Architecture

None

### Logs or notes

_No response_

Start from the Studio app's Add site flow and reproduce a Pressable sync on the described macOS setup, watching the progress at "Initializing remote backup." The payload names no source files or tests, so trace that sync entry point and collect relevant logs first; done means the sync progresses beyond initialization and completes successfully.

Written by the indexing model from the issue text.