有构建板，支持多模型构建，但生成支撑的切片还有bug

app/models.py

@@ -24,6 +24,7 @@ class PrintFile(db.Model):
     user_id = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=False)
     created_at = db.Column(db.DateTime, default=datetime.utcnow)
     status = db.Column(db.String(50), default='waiting') # waiting, slicing, sliced, failed
+    transform_matrix = db.Column(db.Text, nullable=True) # json format of 16-element array
 
 class SystemConfig(db.Model):
     id = db.Column(db.Integer, primary_key=True)