ci: Add issue triage workflow

[ayushiahjolia]

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Issue Link, if available

Followup on aws/aws-durable-execution-ci#6

Description

Adds a GitHub Actions workflow that automatically triages newly opened issues by delegating to the shared reusable workflow in aws/aws-durable-execution-ci.

Demo/Screenshots

N/A

Checklist

• I have filled out every section of the PR template
• I have thoroughly tested this change

Testing

Unit Tests

Have unit tests been written for these changes? N/A

Integration Tests

Have integration tests been written for these changes? N/A

Examples

Has a new example been added for the change? (if applicable) N/A

[github-actions]

Claude AI review

This PR adds a single CI workflow (.github/workflows/issue-triage.yml) that delegates issue triage to a pinned reusable workflow in aws/aws-durable-execution-ci. It touches no SDK source, so the correctness/typing/replay/serialization focus areas do not apply.

The change is well-formed and consistent with existing repo conventions:

• Reusable workflow pinned to a full commit SHA (matches notify.yml, ai-pr-review.yml).
• Top-level permissions: {} with least-privilege per-job issues: write.
• Trigger issues: [opened] is appropriate for triage-on-open.

No actionable findings.

Residual test risk (cannot be confirmed from this diff, since the delegated logic lives in the referenced repo at the pinned SHA — worth a manual check against that reusable workflow):

• .github/workflows/issue-triage.yml:15-19 — no secrets: inherit/explicit secrets: is passed; if the reusable triage workflow needs credentials (as ai-pr-review.yml does), it would fail at runtime.
• .github/workflows/issue-triage.yml:16-18 — only issues: write is granted; if the reusable workflow requires OIDC (id-token: write) or contents: read, the missing permission would cause a runtime failure.

Neither is a defect in the diff itself.

Reviewed commit 771a7e7e7cd8d971d4b3cd1013c2bff4f3235d31. Workflow run

[github-actions]

Codex AI review

No actionable findings. Residual risk: the pinned reusable workflow’s contract and runtime behavior were not locally executable or inspectable.

Reviewed commit 771a7e7e7cd8d971d4b3cd1013c2bff4f3235d31. Workflow run