Upgrade tracing & diffing output support

[justsml]

Add 2 options

• Trace support - runtime sequence & per operation results:
  • { trace?: true } should collect trace log events with timestamps and debug info.
• Record object diffs - use extensible pattern: DiffMethod = (before, after) => changeDescription.
  • { diff?: DiffMethod }
  • Comparison Libraries to test:
    • human-object-diff
    • changeset
    • deep-object-diff
      • updatedDiff(original, updatedObj)
      • detailedDiff(original, updatedObj)
    • just-diff