Architecture: carve settlement into resolve/cancel/archive modules

[josephchimebuka]

Summary

After repairing merge corruption, split the large settlement orchestrator into focused modules for review and WASM size.

Acceptance criteria

• Modules: e.g. resolve, cancel/void, archive, multi-feed
• Public behavior unchanged (test suite green)
• CONTRIBUTOR_MAP updated

Where

• contracts/src/settlement.rs

[Emmanuel-Ugochukwu1]

@Emmanuel-Ugochukwu1 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hello maintainer, please I'd like to work on this issue. i've refactored monolithic smart contracts into sub-modules before to optimize WASM binary size, so splitting settlement into resolve/cancel/archive won't be a problem. assign to me, can have a clean PR ready soon.

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[Guddy1-tech]

@Guddy1-tech has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I have experience working with JavaScript/TypeScript, Git, and open-source projects. I would first review the existing sync flow and understand how multiple instances currently interact, then implement leader election so only one instance performs active synchronization while the others remain passive. I would also add tests to verify leader selection, failover, and that duplicate sync activity is prevented.

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[GOE001]

@GOE001 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I would like to work on this

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[AGWAM001]

@AGWAM001 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I'd love to take this issue on. I'm a full-stack developer with experience across Drips Waves4-7.
My stack include rust, Soroban, Solidity, and TypeScript. I can deliver a clean, tested, and well-documented solution within 24 hours of assignment.
Jovial to start immediately

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[olaleyeolajide81-sketch]

@olaleyeolajide81-sketch has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I would love to work on this issue

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