Quality: normalize round cleanup through storage.rs API

[josephchimebuka]

Summary

Cancel/resolve/void cleanup should go through one audited storage cleanup API to avoid leftover participant/pool keys.

Acceptance criteria

• Single cleanup entry used by terminal paths
• Tests assert key absence after terminalization
• TTL/archive interaction documented

Where

• contracts/src/storage.rs
• contracts/src/settlement.rs

[devgbmuyiwa]

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

hello can i work on this issue

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[mallison031]

@mallison031 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

i will like to work on this issues

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[Dannyorji]

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

Hi
Can i pick this up?

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[drips-wave]

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

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