myrialang: compile temp relations to new encodings
myrialang: compile temp relations to new encodings

@7andrew7 pointed out that hardcoding the Relation key in the JSON is probably
a
bad idea. Instead, I made the Java side handle that, if at all.

uwescience/raco,uwescience/raco,uwescience/raco,uwescience/raco,uwescience/raco