[Feature Request] Add recipe for fixed-flows for AI Agents

[webchick]

Is your feature request related to a problem? Please describe.

This is a "hot topic" that's coming up with the Sales team, raised by @joshmsmith

Describe the solution you'd like

Extract this pattern into a recipe for easy consumption.

Additional context

@samingbar has done some work on this already, see:

• Video: https://www.youtube.com/watch?v=LkWjePaga9A
• Repo: https://temporal.io/code-exchange/document-processing-w-ai