Improve Cape Open Stability and Speed

NeqSim implements the Cape Open Interface 1.1 for Thermodynamics:

https://www.colan.org/specifications/thermodynamics-and-physical-properties-interface-specification-v1-1/

However the implementation is still not fully finalized and stable.

See current code:
https://github.com/equinor/neqsimExcelCapeOpen/tree/master/NeqSimCapeOpen

Any suggestions on how to improve this implementation will be appreciated :-)

Start by reviewing the NeqSimCapeOpen directory and the linked Cape Open Interface 1.1 specification. Identify a specific stability or speed problem before changing anything, then define reproducible checks that show the implementation is more stable or faster; the issue does not name a file, test, or concrete completion criterion.

Written by the indexing model from the issue text.