Workflow: CI Disk Optimization

[yehudit1987]

Background

PR #623 was merged to unblock other PRs.
Maintainer @rootfs requested follow-up improvements.

Use /mnt for Model Storage

• Move model downloads to /mnt directory (has ~75GB vs ~14GB on root)
• Create symlinks from models/ to /mnt/models/
• Update workflow to use this approach instead of deleting toolchains

Example implementation:

• name: Setup model storage on /mnt
  run: |
  sudo mkdir -p /mnt/models
  sudo chown -R $USER:$USER /mnt/models
  ln -sf /mnt/models models

Related

• Original PR: fix(tests): add CI failure tolerance and fix 4 embedding tests (Section 5/5) #623

[liavweiss]

/assign