Fix: CRN API did not expose CPU features for trusted computing

[hoh]

Trusted computing requires CPU features such as sev, sev_es and sev_snp.

This adds the field properties.cpu.features /about/usage/system as a list of CPU features.

Currently, only SEV related features are present, but more can be added, for example avx2, fma and f16c. Adding them will require ensuring that they are actually active and not just present on the CPU via /proc/cpuinfo.

This work is based on a proposal to add the relevant field on aleph-message: aleph-im/aleph-message#100

Example JSON output:

{
  "cpu": {
    "count": 12,
    "load_average": {
      "load1": 0.31494140625,
      "load5": 0.1806640625,
      "load15": 0.17138671875
    },
    "core_frequencies": {
      "min": 2200,
      "max": 3600
    }
  },
  "mem": {
    "total_kB": 16663798,
    "available_kB": 13188161
  },
  "disk": {
    "total_kB": 981630836,
    "available_kB": 879101616
  },
  "period": {
    "start_timestamp": "2024-05-29T18:16:00+00:00",
    "duration_seconds": 60
  },
  "properties": {
    "cpu": {
      "architecture": "x86_64",
      "vendor": "AuthenticAMD"
    },
    "features": [
      "sev"
    ]
  },
  "active": true
}

[codecov]

Codecov Report

Attention: Patch coverage is 90.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 59.94%. Comparing base (4f9b3e6) to head (743a46c).

Files	Patch %	Lines
src/aleph/vm/conf.py	33.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #622      +/-   ##
==========================================
+ Coverage   59.70%   59.94%   +0.23%     
==========================================
  Files          64       64              
  Lines        5443     5458      +15     
  Branches      591      592       +1     
==========================================
+ Hits         3250     3272      +22     
+ Misses       2048     2043       -5     
+ Partials      145      143       -2     

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[hoh]

Requires aleph-im/aleph-message#100

[nesitor]

LGTM, but I think that you already added the sevctl PR changes into that one also.