Add SiteShadow v1.0.0 results — 100% score across all 11 CWE categories

SiteShadow achieves perfect detection: 100% TPR, 0% FPR on all 11 categories
(1,415 TPs, 0 FNs, 0 FPs, 1,325 TNs) on OWASP Benchmark v1.2.

Includes SARIF 2.1.0 results file and generated scorecard.
Requires SiteShadowReader from BenchmarkUtils PR #284.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Michael