﻿Write a SpacetimeDB backend module in Rust that defines a product type and uses it in a table.

TYPES
- Struct: Score
  - Fields:
    - left: i32
    - right: i32

TABLE
- result
  - Struct: ResultRow
  - Fields:
    - id: i32 (primary key)
    - value: Score

REDUCERS
- set_score: given id:i32, left:i32, right:i32, insert exactly this row into result
  - (id=id, value=Score{left:left, right:right})
