feat(cli): install rawstor

[VasilyStepanov]

install rawstor packages in core VM when requested by bootstrap

Reads the with_rawstor flag from spec.json (set by exordos CLI's bootstrap --with-rawstor --pool-agent-placement=core) and installs librawstor + python3.12-rawstor during first-boot bootstrap, alongside the existing element installation steps.

Summary by Sourcery

New Features:

• Support installing librawstor and python3.12-rawstor in the core VM when the spec.json sets the with_rawstor flag.

[sourcery-ai]

Reviewer's Guide

This PR adds optional installation of Rawstor packages during first-boot bootstrap of the core VM, gated by a with_rawstor flag in spec.json, by introducing a helper that downloads .deb artifacts from GitHub releases and installs them alongside existing element bootstrap steps.

Sequence diagram for Rawstor package installation during core VM bootstrap

sequenceDiagram
    participant main
    participant rawstor_installer
    participant github_releases
    participant dpkg
    participant apt_get
    participant element_installer

    main->>main: read_spec_json
    alt [spec.with_rawstor]
        main->>rawstor_installer: _install_rawstor_packages
        loop for each package
            rawstor_installer->>github_releases: wget
        end
        rawstor_installer->>dpkg: dpkg
        rawstor_installer->>apt_get: apt_get
    end
    main->>element_installer: _install_element_from_bootstrap_repo(core)
    main->>element_installer: _install_element_from_bootstrap_repo(ecosystem_realm)

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File-Level Changes

Change	Details	Files
Add helper to download and install Rawstor .deb packages during core VM bootstrap.	Define RAWSTOR_VERSION and RAWSTOR_RELEASES_URL constants for constructing Rawstor package URLs. Implement _install_rawstor_packages to download .deb files to /tmp/rawstor-packages using wget, then install them via dpkg and resolve dependencies with apt-get install -f -y using noninteractive frontend. Ensure the helper runs as root inside the core VM and uses a temporary directory for package artifacts.	exordos_core/cmd/bootstrap.py
Wire Rawstor installation into the bootstrap flow based on spec.json configuration.	Read with_rawstor from the spec dict in main() to determine whether to install Rawstor. Invoke _install_rawstor_packages with librawstor and python3.12-rawstor when with_rawstor is truthy, before installing core and ecosystem_realm elements. Keep existing bootstrap behavior unchanged when with_rawstor is absent or false.	exordos_core/cmd/bootstrap.py

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