Align test automation SDK version with service

[enyst]

Summary

• Remove a stale tracked E2E log artifact that showed pre-OpenHands/software-agent-sdk#3548 client-visible litellm_proxy/* behavior.
• Update scripts/test_tarball/setup.sh to fetch the SDK version from ${AUTOMATION_API_URL}/sdk-version instead of pinning openhands-sdk==1.22.0.
• Pass AUTOMATION_API_URL from scripts/test_automation.py so the test tarball uses the same dynamic SDK-version path as production presets.
• Add regression coverage to prevent the test tarball from reintroducing a hardcoded stale SDK pin.

Validation

• uv run ruff format scripts/test_automation.py tests/test_test_tarball_setup.py
• uv run pytest tests/test_test_tarball_setup.py
• uv run ruff check scripts/test_automation.py tests/test_test_tarball_setup.py
• uv run python -m py_compile scripts/test_automation.py tests/test_test_tarball_setup.py
• Live-like scripts/test_tarball/setup.sh run against a local /sdk-version HTTP endpoint with uv stubbed: confirmed it fetched 1.28.1 and used that version for openhands-sdk, openhands-tools, and openhands-workspace installs.
• Live-like SDK check with openhands-sdk==1.28.1 and the app LiteLLM proxy key: confirmed SDK stores model='openhands/minimax-m2.7', base_url=None, and rewrites only at the LiteLLM call boundary to litellm_proxy/minimax-m2.7 with https://llm-proxy.app.all-hands.dev.

This PR was created by an AI agent (OpenHands) on behalf of the user.

@enyst can click here to continue refining the PR

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