Contracts: Add a test suite for `lumenpulse-curation`

[Cedarich]

Complexity: Medium (150)

Description
apps/onchain/contracts/lumenpulse-curation has no tests. Curation decisions affect what surfaces to users through the backend moderation module, so incorrect state transitions have a direct product impact.

Acceptance Criteria

• Tests cover every curation state transition, including invalid transitions that must revert.
• Authorization is asserted for curator-only and admin-only entry points.
• Events emitted on each transition are asserted, including payload contents.
• Idempotent re-submission of the same decision is handled deterministically.
• Test coverage for the crate is reported in the PR.

_{Wave 8 · source: contract.md}

[OZILSOLAR]

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

OZILSOLAR
Hi team!!!!
I came across this issue and would love to work on it. I have experience with similar tasks and I'm confident I can investigate, implement a clean solution, and thoroughly test it before submitting a PR. If the issue is still open, I would appreciate it if you could assign it to me. Thank you!!!!!!

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

[Adotse10066]

@Adotse10066 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi Maintainer, I’d be happy to work on this issue. I have experience with similar implementations and can ensure the work is completed efficiently and to a high standard.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Adotse10066 to this issue.

[AzraelEryx]

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

I'd be glad to handle this issue. I'll keep the implementation concise, maintainable, and well-documented.

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

[CHKM001]

@CHKM001 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Mr Cedarich
I will get this done for you, and PR within 3 hrs
Thank you

ℹ️ Repo Maintainers: To accept this application, review their application or assign @CHKM001 to this issue.

[Abuh-Bakar]

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

Hi maintainer, I would love to work on this. I have implemeted similar solutions on several projects and I can do same here cleanly and efficiently. Allow me the opportunity to contribute to your project while following contribution guidelines for your project. Kindly assign.

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

[divinemike019]

@divinemike019 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi! I'd like to contribute to this issue.

I have experience developing and testing smart contracts, including state transitions, authorization, event validation, and edge-case handling. I'll build a comprehensive test suite for "lumenpulse-curation" covering every valid and invalid curation state transition, with assertions that invalid transitions correctly revert.

I'll also verify curator-only and admin-only permissions, assert emitted events and their payloads, and test deterministic handling of duplicate or idempotent decisions. The PR will include the resulting crate-level test coverage report to provide clear visibility into the implementation.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @divinemike019 to this issue.