Publish a LitLogger release containing #66; PyPI 2026.6.25 cannot import with current lightning-sdk

The fix for current lightning-sdk compatibility was merged in #66 on 2026-08-05, but it has not yet been published. PyPI still serves litlogger 2026.6.25, which cannot be imported with the current SDK.

Minimal clean-environment reproduction:

REPRO=$(mktemp -d)
uv venv --python 3.12 "$REPRO/.venv"
PY="$REPRO/.venv/bin/python"

uv pip install --python "$PY" 'litlogger==2026.6.25'
"$PY" -c "import litlogger"

This currently resolves:

• litlogger 2026.6.25
• lightning-sdk 2026.8.26

and fails with:

File "litlogger/api/artifacts_api.py", line 18, in <module>
    from lightning_sdk.api.utils import _FileUploader
ImportError: cannot import name '_FileUploader' from
'lightning_sdk.api.utils'

The release boundary is:

• lightning-sdk 2026.7.9.post0: import succeeds
• lightning-sdk 2026.7.21: import fails
• lightning-sdk 2026.8.26: import fails

PR #66 already fixes this by removing the private _FileUploader import, routing upload_metrics_binary through public Teamspace.upload_file, and raising the SDK minimum to 2026.8.5. I also verified that current LitLogger main imports successfully with lightning-sdk 2026.8.26.

Could you please publish a new LitLogger release containing #66?

It would also be helpful to add a clean-environment import litlogger smoke test against both the declared minimum and newest supported lightning-sdk, so future dependency updates cannot leave the latest published pair unimportable.

Start by reviewing PR #66 and litlogger/api/artifacts_api.py, then run the clean-environment uv reproduction with litlogger 2026.6.25. Publish a release containing the merged compatibility fix, and add an import smoke test covering the declared minimum and newest supported lightning-sdk versions.