feat(maxlength): set max_length for BleachFields in ddcomments

discuss_data/ddcomments/migrations/0024_auto_20200602_0644.py

+# Generated by Django 2.2.12 on 2020-06-02 06:44
+
+from django.db import migrations
+import django_bleach.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('ddcomments', '0023_comment_deleted'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='comment',
+            name='text',
+            field=django_bleach.models.BleachField(max_length=1200),
+        ),
+        migrations.AlterField(
+            model_name='notification',
+            name='text',
+            field=django_bleach.models.BleachField(max_length=12000),
+        ),
+    ]

discuss_data/ddcomments/models.py

@@ -37,7 +37,7 @@ class Notification(MPTTModel):
     notification_type = models.CharField(
         max_length=4, choices=NOTIFICATION_TYPE_CHOICES, default=PUBLIC,
     )
-    text = BleachField()
+    text = BleachField(max_length=12000)
     date_added = models.DateTimeField(auto_now_add=True)
     date_edited = models.DateTimeField(auto_now=True)
     owner = models.ForeignKey(
@@ -101,7 +101,7 @@ class Comment(MPTTModel):
     comment_type = models.CharField(
         max_length=4, choices=COMMENT_TYPE_CHOICES, default=PUBLIC,
     )
-    text = BleachField()
+    text = BleachField(max_length=1200)
     date_added = models.DateTimeField(auto_now_add=True)
     date_edited = models.DateTimeField(auto_now=True)
     owner = models.ForeignKey(