• Update to Go 1.19
• Bugfix: Ensure relfrozenxid = 0 is tracked as full frozenxid = 0 (instead of
  adding epoch prefix)
• Amazon RDS and Amazon Aurora: Support IAM token authentication
  • This adds a new configuration setting, db_use_iam_auth / DB_USE_IAM_AUTH.
    If enabled, the collector fetches a short-lived token for logging into the
    database instance from the AWS API, instead of using a hardcoded password
    in the collector configuration file
  • In order to use this setting, IAM authentication needs to be enabled on the
    database instance / cluster, and the pganalyze IAM policy needs to be
    extended to cover the "rds-db:connect" privilege for the pganalyze user:
    https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/UsingWithRDS.IAMDBAuth.IAMPolicy.html
• Amazon RDS: Avoid DescribeDBInstances calls for log downloads for RDS instances
  • This should reduce issues with rate limiting on this API call in some cases
• Amazon Aurora: Cache failures in DescribeDBClusters calls for up to 10 minutes
  • This reduces repeated calls to the AWS API when the cluster identifier is
    incorrect
• Log parsing: Add support for timezones specified by number, such as "-03"