[SharovBot] ci: restore scripts from base branch to fix render-disk-sizes.py not found

[erigon-copilot]

[SharovBot]

Problem

The update-disk-sizes workflow fails with:

python3: can't open file '/home/runner/work/erigon/erigon/docs/site/scripts/render-disk-sizes.py': [Errno 2] No such file or directory

Root cause: the auto-update branch (docs/auto/disk-sizes-release-3.5) was last pushed on 2026-07-17, but render-disk-sizes.py was added to release/3.5 on 2026-07-20 (PR #22596). When the workflow checks out the stale auto branch, the new script is missing.

Fix

After switching to the auto branch, restore docs/site/scripts/ from the base branch (origin/release/3.5). This ensures scripts added after the auto branch was created are always present.

git checkout "origin/$BASE_BRANCH" -- docs/site/scripts/

This only affects the scripts used during the CI run — the actual data files committed by the workflow (disk-sizes.json, hardware-requirements.mdx) are not changed by this restore.

Evidence

• Failing job: https://github.com/erigontech/erigon/actions/runs/30111769336/job/89542756209 (sha 34800ac, 2026-07-24)
• Same failure on sha a7f19f6 earlier

Testing

The change is a one-liner: if the auto branch exists, restore scripts before running them. When the auto branch doesn't exist yet (first run on a new base), this code path is skipped entirely.