Mark stored procedure parameters without defaults as required in OpenAPI

[Copilot]

Why make this change?

• Closes [Bug]: Required params not marked in OpenAPI #3498. The generated OpenAPI document for stored procedure entities omitted the required array on the {entity}_sp_request schema, so parameters that must be supplied (e.g. firstName, lastName) were not flagged as required.

What is this change?

• CreateSpRequestComponentSchema (OpenApiDocumentor.cs): a parameter is now marked required when it is explicitly flagged in config or has no default value. Previously only an explicit config required: true populated the array, which is almost never set, so the array was always empty.
  • Mirrors the existing IsRequestBodyRequired logic (!HasConfigDefault), keeping body-level and property-level required semantics consistent. An explicit config required: false is still honored.

if (def.Required ?? !def.HasConfigDefault)
{
    required.Add(parameter);
}

How was this tested?

• Integration Tests
• Unit Tests

Extended StoredProcedureGeneration.ValidateRequestBodyContents to assert the request body schema's required set contains the expected parameters. Verified the assertion fails when the fix is reverted.

Sample Request(s)

GET /api/openapi — request body schema component for a stored procedure with parameters title, publisher_name (neither having a default):

"sp1_sp_request": {
  "type": "object",
  "properties": {
    "title": { "type": "string" },
    "publisher_name": { "type": "string" }
  },
  "required": [ "title", "publisher_name" ]
}