Add sagemaker ops review - #93

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-python@v5, actions/upload-artifact@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

`functional` results exempted — Functional test results could not be produced due to limitations in accessing the skill evaluation tool, which is not yet published in this repository. In place of tool output, the skill was validated manually across six end-to-end DevOps Agent runs against a test account holding real SageMaker AI resources in us-east-1 and us-west-2 — endpoints (real-time, serverless, and an Inference Component endpoint), notebook instances with and without a customer-managed KMS key, a Studio domain on PublicInternetOnly, pipelines, lifecycle configurations, training jobs, Application Auto Scaling targets with and without scaling policies, and live AWS Health events — with baseline runs performed without the skill for comparison. Runs 1-5 drove the skill from Chat; run 6 drove it through the aws-operation-review router and is the run that exercises the fixes in 1.1.0 and 1.1.1, including the Inference Component scalable dimension, the stale-endpoint CreationTime guard, the notebook-encryption wording, latency units, and AWS Health actionability. Two checks remain unexercised against live data and are logic-reviewed only: Savings Plan healthy-coverage (needs a payer account and a real purchase) and the AWS Health no-support-plan degradation path (the test account has Business/Enterprise support, so neither IAM variant can produce it). That evidence is summarised in the pull request. Requesting a maintainer run on the author's behalf; this exemption should be removed once those results are committed.

`best-practices` results exempted — Best-practices test results could not be produced due to limitations in accessing the skill evaluation tool, which is not yet published in this repository. Requesting a maintainer run on the author's behalf; this exemption should be removed once those results are committed.

`structure` results exempted — Structure test results could not be produced due to limitations in accessing the skill evaluation tool, which is not yet published in this repository. Requesting a maintainer run on the author's behalf; this exemption should be removed once those results are committed.