Finish paragraph marker placement implementation

[isaac091]

• Write unit tests for UpdateBlockHandler
• Merge marker placement UpdateBlockHandler
• Update draft post-processing in silnlp

[josephmyers]

How close are we on this guy? The final checkmark is what Eli's working on?

[Enkidu93]

How close are we on this guy? The final checkmark is what Eli's working on?

I'm not sure what this particular issue is meant to track. Given Isaac's subtasks, I'd imagine that this is only to do with getting it into silnlp. Concurrently, I'm working on getting Isaac's code in Serval - although that'll take a bit longer since it needs to be ported to C# first.

[isaac091]

Yes, this is just for getting it into silnlp. It's basically done, but there are a couple of behavior changes that are needed on the machine.py side based on my testing. I may end up opening a pull request anyways however, because the performance of the new implementation is still strictly better than the current one.