refs https://github.com/TryGhost/Team/issues/467
refs a6f5eb71be
- When a generated excerpt is calculated for posts/page resources it uses raw model! to get the data. Model contains untranformed __GHOST_URL__ markup which has to be additionally processed before extracint an excerpt or use the transformed `plaintext` from available attributes (chose the latter to decrease complexity)
- Removed model dependency as `attrs` at this point of serialization should always contain the `plaintext` field. It's ugly and has an unsolved bug report here - https://github.com/TryGhost/Ghost/issues/10396. The reliance should be solved at some point, but definitely not a part of this issue
6b07d4b2a0