feat: serve the quiz API under /_quizzes/api/v1 behind jwt.auth

models/attempt.go

@@ -4,12 +4,14 @@ package models
 
 import "time"
 
-// Attempt is one user's run through a quiz. The score columns are set when
-// the attempt is finished.
+// Attempt is one user's run through a quiz, or through one category of its
+// questions when Category is set. The score columns are set when the attempt
+// is finished.
 type Attempt struct {
 	ID           uint       `gorm:"column:id;primaryKey"`
 	QuizID       uint       `gorm:"column:quiz_id"`
 	UserID       uint       `gorm:"column:user_id"`
+	Category     *string    `gorm:"column:category"`
 	StartedAt    time.Time  `gorm:"column:started_at"`
 	CompletedAt  *time.Time `gorm:"column:completed_at"`
 	ScorePoints  float64    `gorm:"column:score_points"`