Contributing to LedgerLens Contract

Thanks for your interest in improving the LedgerLens on-chain risk score registry.

Getting Started

Install the Rust toolchain (stable) and the wasm32-unknown-unknown target:
```
rustup target add wasm32-unknown-unknown
```
Fork the repo and create a feature branch off main.
Make your changes inside contracts/ledgerlens-score/.

Run the same checks CI runs:

cargo fmt --all -- --check
cargo clippy --all-targets -- -D warnings
cargo test
cargo build --target wasm32-unknown-unknown --release

Keep contracts/ledgerlens-score/src/types.rs changes minimal and deliberate — RiskScore and DataKey are shared, cross-repo data contracts (see README.md § Organization Architecture). Any field/shape change is breaking for the api, core, and dashboard repos and must be coordinated.
Add or update tests in src/test.rs for any behavioral change.
Keep error codes in errors.rs stable; append new variants rather than reordering or removing existing ones, since their numeric values are part of the deployed contract's ABI.
Update README.md if you change contract function signatures, events, or the deployment flow in deploy.sh.

Describe what changed and why.
Note any cross-repo coordination needed (e.g. "requires api to update its RiskScore schema").
Ensure all CI checks pass.