SleepStageVocabulary: trim newlines consistently on Swift and Kotlin #41

Summary

SleepStageVocabulary.isWake promises to ignore surrounding whitespace, but Swift and Kotlin disagree when that whitespace contains newlines.

This is a pure, deterministic cross-platform parity bug.

Minimal reproduction

input: "\nwake\n"
Swift: false
Kotlin: true

input: "\rawake\r"
Swift: false
Kotlin: true

Cause

Swift trims only .whitespaces. Kotlin uses String.trim(), which also removes surrounding CR/LF characters.

Impact

Imported stage strings with line-ending whitespace can be classified as asleep on Swift but awake on Kotlin. isWake feeds sleep staging, hypnogram metrics, wake-motion refinement and import paths.

Proposed parity fix

Align Swift with Kotlin by trimming .whitespacesAndNewlines.

Acceptance criteria

• Both platforms return true for the two cases above.
• Preserve behavior for normal wake labels, case variants, spaces, tabs, empty strings and non-wake stages.
• Add mirrored native tests and an exact differential case.

This is fully automated; no hardware testing is required.