firmware_uefi: Allow inspect or ohcldiag to reprocess UEFI logs with an increased log level

[maheeraeron]

Enhances the inspect_mut on the UefiDevice such that you can now provide a log level to reprocess the UEFI diagnostics buffer with more verbosity. You can also choose to output this through tracing or stdout. The stdout option is used when issuing this same command through ohcldiag.

This works because the in-memory buffer for UEFI logs technically contains all logs up to the VERBOSE level.

By default we only project ERROR and WARN logs, but now we can get INFO and VERBOSE logs at runtime via inspect or ohcldiag.

Furthermore, this PR also makes it so that when a watchdog timeout fires, we spit out INFO logs with no ratelimit

[Copilot]

Pull request overview

This PR enhances the UEFI diagnostics inspection capability by allowing dynamic log level overrides at runtime. The UEFI diagnostics buffer contains all logs up to the VERBOSE level, but by default only ERROR and WARN logs are projected. This change enables users to reprocess the buffer with increased verbosity (INFO or VERBOSE) via the inspect interface without requiring a restart.

Changes:

• Added log_level_override: Option<LogLevel> parameter to diagnostics processing methods
• Enhanced inspect_mut handler to accept "default", "info", or "full" values for runtime log level control
• Updated all existing call sites to pass None, preserving default behavior

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
vm/devices/firmware/firmware_uefi/src/service/diagnostics/mod.rs	Added log_level_override parameter to both DiagnosticsServices::process_diagnostics and UefiDevice::process_diagnostics methods with documentation updates
vm/devices/firmware/firmware_uefi/src/lib.rs	Enhanced inspect_mut handler to parse log level values ("default"/"info"/"full") and updated all call sites to pass None for the new parameter
vm/devices/firmware/firmware_uefi/fuzz/fuzz_diagnostics.rs	Updated fuzz test to pass None for the new log_level_override parameter

[github-actions]

At least one Petri test failed.