Move encryption methods to the private API

[imobachgs]

• Trello

The storage configuration now accepts encryption method names in both snake_case and camelCase
formats. This improves consistency with the rest of the JSON API, which uses camelCase for
property names (e.g., tpmFde, pervasiveLuks2).

Changes

• JSON Schema: Updated encryptionSwap enum to accept both formats:
  • snake_case (backward compatible): random_swap, protected_swap, secure_swap
  • camelCase (new): randomSwap, protectedSwap, secureSwap
• Ruby Service: Added normalization in the encryption conversion layer to automatically convert camelCase to snake_case before looking up the encryption method
  in Y2Storage
• TypeScript Types: Regenerated type definitions to reflect the updated schema
• Tests: Added comprehensive test coverage for all six encryption method variants

Example

Users can now use either format in their configuration:

  {
    "drives": [{
      "partitions": [{
        "filesystem": { "path": "swap" },
        "encryption": "randomSwap"
      }]
    }]
  }

or the legacy format:

{
  "encryption": "random_swap"
}

Both map to the same Y2Storage::EncryptionMethod::RANDOM_SWAP internally.

Testing

• All existing tests pass (217 examples)
• Added 6 new test cases covering both naming conventions for all three swap encryption methods

Backward Compatibility

✅ Fully backward compatible - existing configurations using snake_case continue to work without changes.