Metacat

use IdMan method to find docids that do not already have system metadata records -- this lets us re-run without re computing system metadata for every entry (in case the process is interrupted). I haven' been using this option because I wanted to continually regenerate all SM for everything in my test DBs, but we are so close to release that I want to get this in there.

for testing: limit and randomize the docs to generate metadata for

FOR TESTING ONLY: limit number of records to 100 so that we can get an estimate

refactor D1-specific upgrade utilities into their own package