[codex] tighten Expo eval follow-ups

[grabbou]

Summary

This PR tightens the Expo eval expansion after review against current SDK 56 docs and local runner behavior.

• Aligns the testbench dependencies with Expo's current SDK 56-compatible versions via expo install --fix.
• Fixes the Expo Router data-loader eval to use unstable_useServerDataLoaders instead of unrelated asyncRoutes config.
• Makes the inline-modules prebuild/build note judgeable by adding an explicit input/reference note file.
• Corrects the Expo Modules web-platform eval to use platforms: ["apple", "android", "web"] plus .web.ts platform resolution, avoiding unsupported web.modules config.
• Tightens the MediaLibrary reference to create a real .png file, verify file.exists, and avoid double-adding the asset to an album.
• Seeds static Expo Modules evals with the config/native/script files their requirements ask solvers to edit.
• Adds missing official Expo SDK source links and clarifies whitepaper wording around requirement weights and inputs.files metadata.

Validation

• bun lint
• bun test runner/evaluators/llm/tests/discovery.test.ts runner/evaluators/llm/tests/requirements.test.ts runner/evaluators/llm/tests/files.test.ts
• bunx expo install --check from testbench/
• bun runner/run.ts --pattern "evals/expo-sdk/17-rn-expo-media-library-file-asset-create" --model noop --output /tmp/evals-expo-sdk-17
• bun runner/run.ts --pattern "evals/expo-router/09-rn-expo-router-data-loaders-config" --model noop --output /tmp/evals-expo-router-09
• bun runner/run.ts --pattern "evals/expo-modules/**" --model noop --output /tmp/evals-expo-modules

Notes

I intentionally did not change the broader whitepaper claim about the historical 66-eval result snapshot versus the current 151-eval inventory, per review direction.