ff_tasks.review_notes JSONB NOT NULL DEFAULT '[]'

Each entry:
{
  "date":          "2026-05-18T10:30:00Z",
  "note":          "Photo of the repaired unit is missing",
  "reviewer_id":   "user_abc",
  "reviewer_name": "Alice Wong"
}

// In the reject transition's Action func:
notes := tctx["review_notes"].([]ReviewNote)
notes = append(notes, ReviewNote{
    Date:         time.Now(),
    Note:         tctx["review_note"].(string),
    ReviewerID:   tctx["reviewer_id"].(string),
    ReviewerName: tctx["reviewer_name"].(string),
})
tctx["review_notes"] = notes
// Service persists the updated notes via repo.Update after Trigger returns

// Overwriting the column — destroys history
task.ReviewNotes = []ReviewNote{{ Note: newNote }} // wrong — append, do not replace

// Clearing on status change
db.Model(&task).Update("review_notes", "[]") // wrong — append-only invariant

// Nil check that may NPE
if task.ReviewNotes != nil { ... } // wrong — always initialize to []ReviewNote{}

// Append in the reject Action, persist in the service
func rejectAction(tctx statemachine.TransitionContext) error {
    notes := tctx["review_notes"].([]domain.ReviewNote)
    tctx["review_notes"] = append(notes, domain.ReviewNote{
        Date:         time.Now(),
        Note:         tctx["review_note"].(string),
        ReviewerID:   tctx["reviewer_id"].(string),
        ReviewerName: tctx["reviewer_name"].(string),
    })
    return nil
}

// Scan with safe default
func (r *TaskRow) toDomain() *domain.Task {
    notes := r.ReviewNotes
    if notes == nil {
        notes = []domain.ReviewNote{} // never return nil
    }
    return &domain.Task{ReviewNotes: notes}
}