perf: 优化 custom info

apps/assets/const/custom.py

@@ -4,7 +4,11 @@ from .base import BaseType
 class CustomTypes(BaseType):
     @classmethod
     def get_choices(cls):
-        types = cls.get_custom_platforms().values_list('type', flat=True).distinct()
+        try:
+            platforms = list(cls.get_custom_platforms())
+        except Exception:
+            return []
+        types = [p.type for p in platforms]
         return [(t, t) for t in types]
 
     @classmethod

apps/assets/migrations/0112_auto_20230404_1631.py

@@ -32,14 +32,13 @@ class Migration(migrations.Migration):
             name='custom_info',
             field=models.JSONField(default=dict, verbose_name='Custom info'),
         ),
-        migrations.RenameField(
-            model_name='asset',
-            old_name='info',
-            new_name='gathered_info',
-        ),
-        migrations.AlterField(
+        migrations.AddField(
             model_name='asset',
             name='gathered_info',
             field=models.JSONField(blank=True, default=dict, verbose_name='Gathered info'),
         ),
+        migrations.RemoveField(
+            model_name='asset',
+            name='info',
+        ),
     ]