Schedule workflow runs with Date or duration string

[jamescmartinez]

#246

Summary

This PR adds support for scheduling runs with either a Date or a duration string (e.g., 5m).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[Copilot]

Pull request overview

Adds support for scheduling workflow runs to start at a specific time by introducing an availableAt run option that accepts either an absolute Date or a duration string (e.g. "5m").

Changes:

• Add availableAt?: Date | DurationString to WorkflowRunOptions and resolve duration strings to an absolute Date before persisting the run.
• Add client tests covering availableAt with a Date, a duration string, and invalid duration handling.
• Update README and docs to document scheduled runs usage.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
packages/openworkflow/client.ts	Adds availableAt run option and converts duration strings into an absolute Date during run creation.
packages/openworkflow/client.test.ts	Adds tests validating scheduled run creation and invalid duration behavior.
packages/openworkflow/README.md	Updates feature list to include scheduled runs.
packages/docs/docs/workflows.mdx	Documents how to schedule a workflow run using availableAt with Date or duration strings.

[Copilot]

Pull request overview

Copilot reviewed 8 out of 8 changed files in this pull request and generated 2 comments.