chore: upgrade to Expo SDK 58 canary

[janicduplessis]

Description

Upgrade Trailhead to the pinned Expo SDK 58 canary / React Native 0.87 stack for the next benchmark campaign. This remains a canary dependency set, not a stable SDK release, and does not by itself fix cross-worktree C++ cache misses.

Solution

Use compatible native-library versions where the canary recommendations fail to build, and keep those overrides explicit so expo install --fix does not undo them. Scoped npm peer overrides and Worklets' explicit Metro dependency make the regenerated lockfile installable without ignoring peer dependencies.

Build only ExpoVideo from source on iOS: the canary's prebuilt framework aborts at launch with Library not loaded: @rpath/Testing.framework/Testing. Other prebuilt Expo modules remain enabled. Keep both committed native projects rather than regenerating them.

Test plan

• Fresh npm ci, full npm ls --all, expo install --check, Expo Doctor, typecheck, lint, and Android Metro export.
• Native Android arm64 and iPhone simulator builds; verify Settings and inspect runtime errors.
• iOS before: prebuilt ExpoVideo terminates before requesting JavaScript. After: source-built ExpoVideo allows launch, Settings proof, and clean runtime logs.
• Same-checkout PCH checks passed (6/6); cross-worktree cache misses remain.