New features:
- Firmware image vendor-signed to prevent a malicious 3rd-party firmware attack vector
Fixed Bugs:
- Reduced USB filesystem privileges to eliminate a potential attack vector
- Reduced privileges of Klipper components to eliminate potential attack vectors
- Removed unused source code stubs to eliminate potential attack vectors
- Printer REST API sanitized against potential malicious code injection
- Service SSH access removed
- Printer name validation by RFC 1123 fixed