Additional comments and caveats to statvar dcid generator (#631)
Additional comments and caveats to statvar dcid generator (#631)

* Adding additional comments and caveats

* Review fixes

Co-authored-by: Ajai <0904c69cb866c87aebcf4f911ac70ee0343e4814@google.com>
datacommonsorg/data,datacommonsorg/data,datacommonsorg/data,datacommonsorg/data,datacommonsorg/data,datacommonsorg/data,datacommonsorg/data