LCC25 controller voltage precision mismatch with instrument specifications

[Gregocact]

Hello everyone,

The LCC25 controller supports voltage tuning down to 1 mV, but the current code uses format_code="{:.1f}" for voltage-related properties. This means when you set a voltage like 1.234 V, the instrument actually gets 1.2 V due to the formatting, which loses precision.
I changed the format_code to {:.3f} in my local copy, and it works as expected with the instrument receiving and displaying the full precision it supports. It’s a pretty small change, but it made some issues in an experiment we were performing.
I can open a PR with the fix if that’s helpful. Just let me know!

Cheers and thanks in advance

[scasagrande]

Would love a pr! Thanks!