Disable NVMe power save in ISO installs

[3alpha]

Description

Disable NVMe APST/power-save mode for ISO installs by adding nvme_core.default_ps_max_latency_us=0 to installer boot entries and to the installed system GRUB defaults generated by Debian preseed and Ubuntu autoinstall.

This targets intermittent crashes seen on some NVMe systems, including ASUS NUC 15 Pro hardware, where disabling NVMe power saving avoids periodic lockups.

Fixes #

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

• ISO install
• Script install
• Other (please detail)

Validated locally:

• git diff --check
• bash -n scripts/dappnode_install_pre.sh
• Parsed both Ubuntu autoinstall YAML files with Ruby YAML loader

Test Configuration:

• DAppNode version:
• Hardware:
• Toolchain:
• SDK:

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings