Add `timeout` feature for agent runs

[conpaine109]

Have you read the docs? Agents SDK docs – YES

Have you searched for related issues? Others may have had similar requests – YES

Describe the feature
It would be helpful to have a max_time parameter for the run() and run_streamed() methods, allowing users to automatically terminate runs that exceed a specified duration.

While this functionality is straightforward for users to implement manually, it would be convenient to have it built into the SDK.

Proposed behavior:

• If run_time > max_time, raise a TimeoutError (some relevant err).

• For streaming runs: max_time counts seconds before the first token is received.

• For runs: max_time counts seconds before the RunResult is returned.

I've noticed over the past several days that runs have generally been taking longer, and I had to implement my own timeout logic. A built-in option would be clutch! Just some thoughts...

[seratch]

Thanks for the suggestion. We don't have immediate plans to add this, but if many devs hope to have this as a built-in feature, we may revisit this in the future.