ci: Ambient SDK Drift Check workflow failing on every run

[jeremyeder]

Problem

The Ambient SDK Drift Check workflow (.github/workflows/ambient-sdk-drift-check.yml) is failing on every push/PR to main and on manual dispatch. Recent failures:

• https://github.com/ambient-code/platform/actions/runs/24735001421
• https://github.com/ambient-code/platform/actions/runs/24733395044

Context

Discovered while investigating the SDK version bump workflow failure (fixed in #1381). This is a separate issue — the drift check compares regenerated SDK output against committed code in components/ambient-sdk/.

Next steps

• Check the failure logs to identify root cause
• May be a generator/spec mismatch or missing tooling in CI

[jeremyeder]

@markturansky