Boolean columns

[fengelniederhammer]

resolves #1713

preview URL: https://booleancolumn.loculus.org/

Summary

See ticket - SILO now supports metadata type boolean.

This also includes some small refactoring (moving logic out of the Astro frontmatter and using neverthrow results more idiomatically).

Screenshot

UI-wise, nothing should change. But LAPIS now returns boolean values:

{
  "data": [
    {
      "count": 1,
      "isRevocation": true
    },
    {
      "count": 60,
      "isRevocation": false
    }
  ],
  "info": {
    "dataVersion": "1714465022",
    "requestId": "8a28d34f-885b-4a5e-a5f1-238b53da58a2",
    "requestInfo": "Test Dummy Organism on localhost at 2024-04-30T08:19:48.766097331",
    "reportTo": "Please report to https://github.com/GenSpectrum/LAPIS/issues in case you encounter any unexpected issues. Please include the request ID and the requestInfo in your report."
  }
}

PR Checklist

• [ ] All necessary documentation has been adapted.
• The implemented feature is covered by an appropriate test.

[chaoran-chen]

Looks great, thanks!

When merging, please make sure to rebase instead of squash so that the refactoring does not get merged together with the actual boolean column implementation.