beta release v0.2.5.1b4

This beta adds early Snapmaker U1 support through the existing Moonraker/Klipper provider.

Printbuddy can now detect and normalize U1-specific telemetry, including the four nozzle/extruder objects, active tool selection, chamber/cavity temperature, and attached feeder channels. U1 feeder slots are mapped into the existing AMS/CFS-style slot view, so detected spools can be shown and assigned using the current filament workflow.

Where available from the printer, Printbuddy also reads filament metadata such as material, color, remaining percentage, and remaining weight. Because Snapmaker’s public Klipper sources do not yet expose a fully confirmed stable RFID/spool status object over Moonraker, this beta treats feeder slots as detected filament sources and does not auto-create inventory spools.

This is an initial compatibility release and real U1 hardware feedback is welcome, especially around spool metadata and multi-nozzle status reporting.