`create_batch_streams` forces one `clawback` flag across the whole batch

[Jaydbrown]

contracts/factory/src/lib.rs create_batch_streams(sender, requests, clawback: bool) applies the single clawback to every request, because contracts/factory/src/storage.rs BatchStreamRequest has no clawback field. create_stream takes clawback per stream. Add clawback: bool to BatchStreamRequest so a batch can mix clawback and non-clawback streams.

---

Filed from a codebase review pass.

[omoniyiadebayo12goal-crypto]

@omoniyiadebayo12goal-crypto has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi, I’ve carefully reviewed the issue details and I’m confident I can provide a clean and efficient solution.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @omoniyiadebayo12goal-crypto to this issue.

[alfeedrips]

@alfeedrips has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Can I work on this task?

ℹ️ Repo Maintainers: To accept this application, review their application or assign @alfeedrips to this issue.

[drips-wave]

Congratulations, @alfeedrips! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @alfeedrips: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊

[drips-wave]

This issue has been completed by @alfeedrips as part of the Stellar Wave Program's 8th Wave 🥳

😎 @alfeedrips: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here. You can also Leave a review to share your experience working on this issue.

🧑‍💻 Repo maintainers: How'd the contributor do? Leave a review to share your experience working with them.