Add computed `score` integer to `rep_updated` event data

[Kingsman-99]

Description

rep_updated in contracts/split/src/events.rs emits the full RepScore struct, but there is no computed score integer field — the struct contains raw counts (paid_on_time, late_pays, etc.). Adding a derived score: u32 to the event data would save indexers from re-computing the score formula off-chain.

Acceptance Criteria

• Add a score: u32 parameter to rep_updated in contracts/split/src/events.rs
• Include it in the event data: (score_struct, computed_score)
• Update all call sites in lib.rs
• Update existing tests for rep_updated
• cargo test passes

Context

• Target file: contracts/split/src/events.rs
• The computed score formula should be documented inline

[Chronos-III]

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

hi team kindly assign me i can work on this issue am a software developer

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[drips-wave]

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

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