* fix: update tests and examples for upstream API changes
Align error types, struct fields, and constructor calls in 27 test/example
files to match current Core API:
- Box<dyn Error> -> Box<dyn Error + Send + Sync> to match Core::new()/shutdown()
- entry::ActiveModel device_id -> volume_id (field rename)
- location::ActiveModel add volume_id field (new nullable field)
- AppConfig add proxy_pairing and spacebot fields (config v5/v6)
- Re-export ProxyPairingConfig from config module
- VolumeFingerprint::new() -> from_primary/external/network_volume()
- DeviceInfo add device_type field, NetworkFingerprint public_key -> public_key_hash
- SecretKey::generate(thread_rng) -> from_bytes (rand_core version mismatch)
- SdPath::Physical.path String -> PathBuf, thumbnail_url &Uuid -> &str
- init_sync_service unwrap networking Option for Arc<dyn NetworkTransport>
* fix: prevent busy-loop in sync loop when real-time sync is active
The sync loop's Ready state used 'continue' when is_realtime_active()
returned true, which skipped the sleep at the bottom of the loop and
caused a CPU-saturating busy-loop logging 'Skipping catch-up' hundreds
of thousands of times per second. Replace with if/else so the
realtime-active branch falls through to the configurable sleep.
c63f1b078b