feat(core): upgrade to v2.65.0 with Cognition Layer & Proactive Advisor

- Integrated v4.0 Operational Policy into AgentEngine and AgentExecutor.
- Added Context Amplification for policy-driven reasoning.
- Implemented Proactive Advisor for next-action decision forks.
- Added CognitionAudit diagnostics for real-time policy monitoring.
- Updated test suites to support dual-execution cognition patterns.

src/lib/diagnostics.ts

@@ -93,3 +93,33 @@ export class PerformanceProfiler {
         );
     }
 }
+
+export class CognitionAudit {
+    /**
+     * [Astra v4.0] 지능적 판단 및 정책 준수 여부를 감사(Audit)합니다.
+     * 시스템이 얼마나 '생각'하고 '경고'했는지 정량적으로 측정합니다.
+     */
+    public static auditPolicyCompliance(stage: string, content: string): void {
+        const findings = [];
+        
+        // 1. 충돌 경고 감지 (Conflict Warning)
+        if (content.includes('[CONFLICT WARNING]')) {
+            findings.push('Conflict Detected & Warning Issued');
+        }
+        
+        // 2. 선제적 제안 감지 (Proactive Advice)
+        if (content.includes('## 💡 Astra의 선제적 제안')) {
+            findings.push('Proactive Advice Generated');
+        }
+        
+        // 3. 신뢰도 인용 패턴 확인 (Credibility Usage)
+        const highTrustCitationCount = (content.match(/\[\[/g) || []).length;
+        if (highTrustCitationCount > 0) {
+            findings.push(`Knowledge Density: ${highTrustCitationCount} connections used`);
+        }
+
+        if (findings.length > 0) {
+            logInfo(`[CognitionAudit] [${stage}] ${findings.join(' | ')}`);
+        }
+    }
+}