Marquez 0.38.0

Added

• API: add db retention support #2486 @wslulciuc
  Adds migration, a dbRetention config in marquez.yml for enabling a retention policy, and a db-retention command for executing a policy.
• API: add runs state indices #2535 @phixme
  Adds four indices to help run retention faster.
• API: define DbRetentionJob(Jdbi, DbRetentionConfig) #2549 @wslulciuc
  Adds @Positive to DbRetentionConfig instance variables for validating DbRetentionConfig properties internally within the class.
• API: add log for when retention job starts #2551 @wslulciuc
  Adds logging of DbRetentionJob.

Fixed

• API: fix slow dataset query updates #2534 @phixme
  Scopes down nested facet queries to be the same scope as the outer query.
• Client/Python: increase namespace length to 1024 characters #2554 @hloomupgrade
  Changes the namespace length constraint to sync up with the Java client's.
• Web: remove pagination in case of no content #2559 @Nisarg-Chokshi
  Updates Dataset & Event route rendering to remove pagination in the case of no content.