I came across this requirement quite frequently in which you have very long field names that are more than the character limit defined by Project Server. What we usually end up doing is rephrase the field name to fit the character limit and add the full text in the description. It looks something like this:
I have developed the following Rename fields script that will replace the field name with field descriptions and it will make the fields look like this:
You just need to refer this script on your PDP and it will automatically pick fields with description.