MegaRAID controller scripts for monitoring and diagnostics

Provides the `has_dellperc` fact

Installs perccli RAID management utility

Filter your DELL PowerEdge PERC log in a simple web page and find what is wrong with your local storage.

Bootable Debian live ISO for Dell PowerEdge R920 recovery. PERC H730P RAID management (PERCCLI), LVM/ZFS/mdadm tools, disk recovery utilities, and optional Claude Code AI assistant. Dual UEFI + Legacy BIOS boot with iDRAC serial console support.