Added

• Add cluster info endpoint at _elastic
• Add support for custom tokenizers ngram and regex
• Add storage flavors
• Allow dots in identifier

Fixed

• Fix mrecordlog corruption bug

• Fix merge planner issue #3576 by fetching only immature splits.
  A short note on this fix. The upgrade will trigger a Postgresql migration, adding the column maturity_timestamp to the splits table.
  By default, the maturity_timestamp is set to 1970-01-01 00:00:00. All your splits will be considered mature and won't
  undergo merge operations. This is primarily true for your splits, but... it may not be for splits created recently. You can do an additional
  operation, like set the maturity_timestamp of recent splits with a low number of documents to a timestamp in the future, like now + 48h.
  For the file-backed metastore, there is no migration process, the upgrade will add to a new field maturity for splits in the metastore.json file. By default it will be set to {"type": "mature"} but, as for Postgresql, you may want to set a different value for the split maturity like {"type": "immature", "maturation_period_millis":172800000}.

• Fix storage and metastore configuration