fix(service-kit): match Provider manifest wire shape

[LioRael]

Summary

• omit empty Module requirements from serialized Provider manifests
• materialize the empty runtime schedules collection expected by Rust canonical serialization
• preserve legacy Service adapter compatibility when requires is absent

Verification

• pnpm --filter @lenso/service-kit build
• pnpm --dir sdk/typescript test (53 tests)
• real Notification → Email Provider Host acceptance passed the exact Module Release digest check with this shape

This closes the manifest digest drift found while completing #545.

[changeset-bot]

🦋 Changeset detected

Latest commit: 5450274

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@lenso/service-kit	Patch

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[LioRael]

Superseded by #567, which landed the same canonical Rust wire-shape fix and was released through #568.