Revenue pool: `batch_distribute` — sum validation + atomic transfers

[greatest0fallt1me]

Description

Precompute total required USDC, validate every amount is positive, ensure on-ledger balance covers total, then perform transfers; emit per-leg events.

Requirements and context

• Must fail without partial external transfers if later legs would fail.
• Document vector size policy (see related cap issue).

Suggested execution

• Fork the repo and create a branch: git checkout -b feature/revenue-pool-batch-distribute
• Implement changes in the Callora-Contracts Soroban workspace (contracts/*/src/).
• Run cargo fmt, cargo clippy --all-targets --all-features -- -D warnings, and cargo test from the workspace root.
• For WASM release builds: cargo build --target wasm32-unknown-unknown --release -p callora-revenue-pool (adjust -p if the crate name differs).

Deliverables

• lib.rs + test.rs.
• Edge tests: duplicates, many recipients, insufficient aggregate balance.

Test and commit

• Run tests and ./scripts/coverage.sh (or cargo tarpaulin per tarpaulin.toml).
• Cover edge cases; include summarized test output and brief security notes in the PR description.

Example commit message

feat(revenue-pool): batch_distribute validation and tests

Guidelines

• Minimum 95% line coverage for touched crates (workspace policy).
• Clear documentation (Rust /// on public items where applicable; repo markdown as needed).
• Timeframe: 96 hours from assignment unless agreed otherwise.

[drips-wave]

This issue has been added to the Stellar Wave Program and is worth 200 Points.

🧑‍💻 Interested in contributing? Apply to work on this issue on Drips Wave, earn points, and receive rewards.

Warning

Only applications submitted via the apply link above will be considered. Please do not apply by commenting on the issue or opening a PR directly.

🤠 Repo maintainers: You can manage this issue's Points and Complexity on your Maintainer Dashboard here. Please keep an eye on applications and respond quickly 💙

ℹ️ Learn more about Drips Wave

[Ebuka321]

@Ebuka321 has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

Hello Good day. Please can i work on these ?

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Ebuka321 to this issue.

[drips-wave]

Congratulations, @Ebuka321! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on March 30, 2026.

🧑‍💻 @Ebuka321: 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 🌊