Update Geospace handler to expect numeric georegion feature IDs

N.B. Please leave merging the branch to me (Urmila) - without running the appropriate migration script immediately afterwards (which I am still working on), staging will be broken.
You could just combine these two lines:

    featureIdsWithIndex.get(i).map { case featureId =>
      UpsertAsSoQL(.....) 
    }.getOrElse(upsert)