L003: do not analyze multi-columns PKs, fix JSON syntax
- Skip multi-column PKs: analyzing each column in them may cause a huge slowdown,
- Fix JSON syntax (previously, jq was not complaining, but syntax lacked some commas)
- Additionally, decreased MIN_RELPAGES for "large" tables from 1000 to 100 because the process is much faster now. This threshold may be eliminated in the future, depending on the behavior on databases with huge number of objects.
Edited by Nikolay Samokhvalov