Function batch_verify_events_parallel 

pub fn batch_verify_events_parallel(events: &[AuditEvent]) -> Result<()>

Batch-verify event signatures with parallel canonical bytes computation.

Uses Rayon to parallelize the canonical bytes serialization across cores, then uses batch verification for signatures. This is optimal for large batches.

Performance

• 100 events: ~1.5x faster than batch_verify_events
• 1000 events: ~2-3x faster than batch_verify_events
• Scales with available CPU cores