Support question-level LLM prompt

lib/cadet/assessments/question_types/programming_question.ex

@@ -13,13 +13,14 @@ defmodule Cadet.Assessments.QuestionTypes.ProgrammingQuestion do
  field(:template, :string)
  field(:postpend, :string, default: "")
  field(:solution, :string)
+ field(:llm_grading_prompt, :string, default: "")
  embeds_many(:public, Testcase)
  embeds_many(:opaque, Testcase)
  embeds_many(:secret, Testcase)
  end
 
  @required_fields ~w(content template)a
- @optional_fields ~w(solution prepend postpend)a
+ @optional_fields ~w(solution prepend postpend llm_grading_prompt)a
 
  def changeset(question, params \\ %{}) do
  question

lib/cadet/jobs/xml_parser.ex

@@ -203,7 +203,8 @@ defmodule Cadet.Updater.XMLParser do
  prepend: ~x"./SNIPPET/PREPEND/text()" |> transform_by(&process_charlist/1),
  template: ~x"./SNIPPET/TEMPLATE/text()" |> transform_by(&process_charlist/1),
  postpend: ~x"./SNIPPET/POSTPEND/text()" |> transform_by(&process_charlist/1),
- solution: ~x"./SNIPPET/SOLUTION/text()" |> transform_by(&process_charlist/1)
+ solution: ~x"./SNIPPET/SOLUTION/text()" |> transform_by(&process_charlist/1),
+ llm_grading_prompt: ~x"./LLM_GRADING_PROMPT/text()" |> transform_by(&process_charlist/1)
  ),
  entity
  |> xmap(