feat(engine): manage logs of PostgreSQL containers to simplify diagnostics (#349)

Description

Implementation of containers logs collection in case of errors

Included changes:

• introduced diagnostic package with functions to get container and postgres logs
• updated configuration to have separated configuration option for log retention:

diagnostic:
  logsRetentionDays: 7

• updated main function to start background cron job for cleaning old logs

Related issue

#349 (closed)

Examples

Collected logs during failures:

Checklist

• MR description has been reviewed
• MR changes are functionally tested
• MR does NOT have text changes OR there are text changes and they have been reviewed
• MR does NOT have API/CLI changes OR there are API/CLI changes and they have been reviewed
• MR does NOT have UI changes OR there are UI changes and they have been reviewed

Closes #349 (closed)