/claim #8154

Summary

• improve OS family detection by using both ID and ID_LIKE from /etc/os-release
• keep Debian 13 compatible by falling back Docker apt repo codename to bookworm when codename is missing/numeric or equals trixie
• add explicit Alpine prerequisites + Docker install path

Changes

• app/Models/Server.php
  • extracted parseOsRelease()
  • added detectSupportedOsType() with ID_LIKE fallback support
• app/Actions/Server/InstallPrerequisites.php
  • added Alpine branch (apk update && apk add --no-cache curl wget git jq)
• app/Actions/Server/InstallDocker.php
  • added Alpine Docker install command
  • added Debian codename normalization fallback for Docker apt repo setup
• tests/Unit/ServerOsDetectionTest.php
  • OS detection tests for ID, ID_LIKE, unsupported OS
  • command-generation checks for Debian codename fallback and Alpine install command

Closes #8154