Cannot get pretranslated USFM for Isaiah 9 in DHH94

[pmachapman]

When a project uses DHH94 as the source, GetPretranslatedUsfmAsync() will fail with the following error:

{System.ArgumentOutOfRangeException: startIndex ('-1') must be a non-negative value. (Parameter 'startIndex')
Actual value was -1.
   at System.ArgumentOutOfRangeException.ThrowNegative[T](T value, String paramName)
   at System.String.ThrowSubstringArgumentOutOfRange(Int32 startIndex, Int32 length)
   at System.String.Substring(Int32 startIndex, Int32 length)
   at SIL.Machine.Corpora.PlaceMarkersUsfmUpdateBlockHandler.ProcessBlock(UsfmUpdateBlock block) in PlaceMarkersUsfmUpdateBlockHandler.cs:line 250}

This issue is currently occurring on live and QA.

[Enkidu93]

Unfortunately, this issue is caused by a versification mismatch between the project-specified versification and the actual USFM. Because this is a resource whose versification cannot be modified, I recommend that we:

• Don't crash: Either within the PlaceMarkersUsfmUpdateBlockHandler or within a wrapper (which we could re-use on other handlers as well), we should just skip over verses where we crash.
• And log any errors experienced when handling an update block. The simplest thing to do would be to write to the log. It would be nice if these errors were more visible/noticeable though, but it seems odd to, for example, stick these in the execution data 🤔.
  How does that sound, @ddaspit?

[ddaspit]

Sounds good to me.