[MattieGit]

Summary

• New async_verify_device(): returns True when register 77 (GeneralMng.Softversion) can be read, also when it reads 0, and False when the read fails.
• Since 1.16.1, async_get_software_version() returns None for a register that reads 0. The Home Assistant core config flow uses None to mean "not a Qube", so a core bump to 1.16.1 would reject Qubes on 4.1.00. Core will use this method to validate a host instead.
• async_get_software_version() is unchanged.
• README feature line; version 1.17.0.

Testing

• New tests: a version value and a 0 reading both verify; a failed read does not. 145 pass, ruff 0.14.14 clean.
• The core branch that bumps to 1.17.0 and switches the config flow to this method passes its tests against this branch.