Fix 366 publish assessment grades for hook studies

[akash9676]

Summary

Publish Assessment and project grade export were reading only assessment_result and flattening scores as { Criterion: { currentScore } }. Hook studies store aiHook_{id} (or {name}_{skill}_assessment) in other shapes, so CSV, Moodle grades, and the grades ZIP came out as zeros. This PR looks up those keys, flattens the stored value through scoresFromStoredValue in assessment-score, and prefills Moodle connection fields from settings.

Improvements

• Moodle course ID, API key, and API URL are copied from rpc.moodleAPI.* when a parent form starts with {} (MoodleOptions.vue). Assignment ID is still picked per publish.
• assessment-score exports scoresFromStoredValue for NLP lists, numeric maps, and saved criterion state. Publish Assessment and export.js both import it. Tests cover the list and map cases.

Bug Fixes

• Publish Assessment CSV and Moodle grades now use hook/NLP keys as well as assessment_result, including trigger rows with a null session (PublishAssessmentModal.vue).
• The Moodle step binds moodleOptions: {} so the form actually renders.
• Project grade export queries aiHook_% and *_assessment as well as assessment_result, groups duplicate keys, and prefers a non-zero saved result over the hook row (export.js).

Known Limitations

• N/A

Future Steps

• N/A