[SW #999]: Migrate: Improve body rewriting for dme/embed tags:
[SW #999]: Migrate: Improve body rewriting for dme/embed tags:

- Instead of counting (4) paragraphs, only put an embed tag into the
  body if we've seen 1000 (or more) characters (tags stripped).
- Avoid putting a <drupal-entity> tag inside <blockquote>.

ISO-tech/sw-d8,ISO-tech/sw-d8,ISO-tech/sw-d8,ISO-tech/sw-d8