Dump container logs and health probes on healthcheck failure

[adamtheturtle]

Summary

• Closes test_build_and_run: dump container logs and Health.Log on healthcheck failure #3147. When wait_for_health_check exhausts its retries in tests/mock_vws/test_docker.py, it now augments the raised ValueError with the container's logs and Docker's State.Health.Log probe history so CI failures are diagnosable rather than just reporting unhealthy.

Test plan

• Existing test_build_and_run still passes locally / in CI
• On a forced failure, the error message includes container logs and probe entries

🤖 Generated with Claude Code

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Note

Low Risk
Low risk: test-only change that augments failure diagnostics without altering production behavior; main risk is noisier CI output or unexpected decode/attr edge cases when containers lack health log data.

Overview
When wait_for_health_check exhausts retries in tests/mock_vws/test_docker.py, it now re-raises with additional diagnostics: the container’s logs and Docker State.Health.Log probe history.

The retrying poll logic is split into _poll_health_check (tenacity-decorated) plus a wrapper that formats and chains the enriched ValueError for easier CI debugging.

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