chore(release): version packages

[sumfxn]

What

Version packages for the next npm release.

• @usdh-kit/sdk: 0.2.0 -> 0.3.0
• @usdh-kit/widget: 0.1.0 -> 0.1.1
• consumes the pending SDK discovery, outcome reads, and release-safety changesets
• updates SDK/widget changelogs
• updates the SDK README current version line

Audit

Expected release output:

• SDK minor: USDH spot discovery + experimental read-only outcome reads
• Widget patch: dependency metadata/package-license safety, no widget major
• No private app/example version churn
• No release of @usdh-kit/widget@1.0.0

Validation

• npm registry currently has @usdh-kit/sdk@0.2.0
• npm registry currently has @usdh-kit/widget@0.1.0
• pnpm install --frozen-lockfile --ignore-scripts
• pnpm lint
• pnpm build
• pnpm typecheck
• pnpm test
• git diff --check
• pnpm --filter @usdh-kit/sdk pack --pack-destination /private/tmp
• pnpm --filter @usdh-kit/widget pack --pack-destination /private/tmp
• live read-only Hyperliquid probes passed on mainnet/testnet

Release

The release workflow is gated behind RELEASES_ENABLED == 'true'. Merge this PR only with that variable deliberately enabled for the publish run.