4.3 Document the parallel run steps

GPT
User Prompt
Intermediate

Prompt

Update the Parity and comparison strategy section in pilot_reporting_validation.md so that it includes a clear, ordered list of commands to:
- Prepare or load the input data set
- Run the COBOL pilot flow on that data
- Run the modern pilot flow on the same data
- Compare outputs and interpret the results
- Include precise paths for outputs and a short description of what success looks like