v2.0.4

Unify eval scorer parameter names (#192)

## Summary
- rename scorer input parameters to `sourceColumn`, `expected`, and
`expectedColumn`
- support literal and column-backed expected values for compare,
contains, and trajectory scorers
- export scorer option types and reject removed aliases while preserving
backend configuration keys

## Test plan
- [x] `npm test -- --run src/evaluations/scorers/scorers.test.ts
src/evaluations/columns.test.ts src/evals.test.ts`
- [x] `npm run lint`
- [x] `npm run build`

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