Add export_full_log() method to FuzzerState that exports a comprehensive
log of all events including errors, refusals, and successful outputs.
Previously only failures were exported. This change addresses issue #100
by creating a complete audit trail in full_scan_log.csv with event type,
module, prompt, status code, content, and refused flag columns.
Co-Authored-By: Nivesh Dandyan <niveshdandyan@gmail.com>
