Support UTF-8 SSIDs

[paysonwallach]

Context

Pairing over a WiFi network whose name contains non-ASCII characters fails.

Proposed change

Treat the SSID as opaque bytes instead of trying to decode each character.

I must confess that Claude proposed this solution. It's not clear to me why the current implementation does not work.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New device
• New product id (the device is already supported with a different id)
• New feature (which adds functionality to an existing device)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests
• Documentation

Checklist

• The code change is tested and works locally.
• The code has been formatted using Black.
• The code follows the Zen of Python.
• I am creating the Pull Request against the correct branch.
• Documentation added/updated.