bindAudit now wraps the inner sink/fan-out with TraceIdEnrichingAuditLog so
all sinks receive AuditEntry.correlationId auto-populated from the active
OTel span. bind-audit.test.ts assertions updated to check instanceof
TraceIdEnrichingAuditLog first, then .inner for the concrete sink type.
TraceIdEnrichingAuditLog exported from the package barrel.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
