betracky_background_location

Bug fixes:

• offlineEnabled: true now stores locations in SQLite even when no url is configured. Previously the local DB write was skipped because the URL guard fired first, making getStoredLocations() always return empty for local-only usage.
• startService now throws a StateError immediately if location permission is denied, instead of starting silently and producing no updates.
• Added a debugPrint warning when foregroundService: true on Android, reminding developers to grant POST_NOTIFICATIONS at runtime (Android 13+). Without it the foreground notification is suppressed and the OS will kill the service when the app is closed.
• README: Added "Runtime permissions (critical)" section with explicit code showing Permission.notification.request() must be called before startService.

• Minor stability improvements.

• Offline mode batch upload improvements.

• iOS background service configuration fixes.

• Initial release of BeTracky Background Location Service.
• Background location tracking with configurable distance filter and accuracy.
• Start on boot and foreground service support.
• Offline mode: store locations locally and upload in batches of 50 when back online.
• Upload locations to a custom endpoint with optional Bearer token authentication.