feat: improve Bose SoundTouch parity, Spotify integration, and data
reliability
- Update XML marshaling for ServicePreset and ServiceRecent to match
Bose parity requirements.
- Add support for adding music sources via
`/streaming/account/{account}/source`.
- Implement HandleBoseAccountToken for Spotify OAuth code exchange and
token persistence.
- Implement atomic file writes in the datastore to prevent data
corruption.
- Add startup logic to initialize default sources for existing devices.
- Expand test coverage with new parity regression and Spotify
integration tests.
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Co-authored-by: Junie <junie@jetbrains.com>
Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
Tobias Gesellchen
