[TheGreatAxios]

Closes CL-11894.

What changed

• Writer and reviewer steps get a native step timeout of 10 minutes, the default in each workflow package; a host can pass stepTimeoutMs to change it (previously only the run lifetime bounded them). No retry: a second attempt would redo work the first may already have filed or mailed.
• (vendor) commit: when a step's own timer fires, its StepFailed records error.code: "step-timeout" (the event's existing optional code field, as crash-mid-invocation already does) with a message naming the step and the limit, instead of a bare "The operation was aborted.". Outer cancellation is unchanged. Manifest updated.

Verified

• New workflows/writer/src/workflow.test.ts runs the real writer workflow in the in-memory runtime with a model that never answers: exactly one StepFailed on write with code: "step-timeout", then RunFailed.
  • Fails without the workflow timeout (run never settles) and without the vendor patch (no code).
• bun run lint, format:check, typecheck, vendor:verify clean; bun run test 71 pass; packaged.test.ts 3 pass; vendored workflow runtime tests 385 pass.

[linear-code]

CL-11894

[corbits-triage]

Triage: Unsure

Asking a maintainer about:

• changes sensitive paths: vendor: vendor/interchange.manifest.json, vendor: vendor/interchange/packages/workflow/src/runtime/run.ts

Notes:

• Not confirmed: makes one focused change

[corbits-triage]

Triage requests changes:

• Conventions: added code matches a code pattern

Nothing triage asked to change still fails, so this request no longer stands.