Output reports for CLI operations

[scossu]

Key Requirements

• Direct relevant output to a specific report file for CLI operations that expect it, e.g. migration or integrity checks

Implementation

• Create configuration option to specify an output file
• If no output file is specified, a file with a default prefix and a unique serial number is used
• Direct specific output to this file (e.g. by using a custom log level and handler)
• Use a machine-parsable format for the output
• Make this feature available for CLI operations expecting some sort of reporting: check_fixity (not yet implemented), check_refint, migrate.
  • N.B. stats may not need a report file since its output is predictably contained and may be more likely used for piping console output directly

[scossu]

Report for check_refint only. migrate is not relevant enough.