v0.49.0

• Update pg_query_go to v4 / Postgres 15 parser
  • Besides supporting newer syntax like the MERGE statement, this parser
    update also drops support for "?" replacement characters found in
    pg_stat_statements output before Postgres 10
• Postgres 10 is now the minimum required version for running the collector
  • We have dropped support for 9.6 and earlier due to the parser update,
    and due to Postgres 9.6 now being End-of-Life (EOL) for over 1 year
• Enforce maximum time for each snapshot collection using deadlines
  • Sometimes individual database servers can take longer than the allocated
    interval (e.g. 10 minutes for a full snapshot), which previously lead to
    missing data for other servers monitored by the same collector process
  • The new deadline-based logic ensures that collector functions return with
    a "context deadline exceeded" error when the allocated interval is exceed,
    causing a clear error for that server, and allowing other servers to
    continue reporting their data as planned
  • As a side effect of this change, Ctrl+C (SIGINT) now works to stop a
    collector test right away, instead of waiting for the snapshot to complete
• Log Insights
  • Only consider first 1000 characters for log_line_prefix to speed up parsing
  • Clearly report errors with closing/removing temporary files
  • Improve --analyze-logfile mode for debugging log parsing
  • Amazon RDS/Aurora: Improve handling of excessively large log file portions
  • Azure DB for Postgres: Fix log line parsing for DETAIL lines
• Collect xmin horizon metrics
• Bugfixes
  • Relation info: Correctly filter out foreign tables for constraints query
  • Return zero as FullFrozenXID for replicas
  • Update Go modules flagged by dependency scanners (issues are not actually applicable)