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/agent.ts

@@ -382,8 +382,16 @@ export class AgentExecutor {
                 ? `\n\n${renderSecondBrainTraceContext(secondBrainTrace)}`
                 : '';
             const memoryCtx = this.buildMemoryContext(prompt || '', activeBrain);
+            
+            // [Astra v4.0] 지식 관리 운영 정책 주입
+            const v4PolicyCtx = [
+                "\n### 🏛️ 지식 관리 정책 v4.0 (Knowledge Management Policy Applied)",
+                "- [신뢰도] '의도적으로 작성된 글'은 Medium 이상의 신뢰도를 부여하여 최우선 근거로 활용할 것.",
+                "- [품질] 데이터의 양보다 '추론 기여 밀도'를 중시하여 핵심 위주로 깊이 있게 서술할 것.",
+                "- [충돌] 지식 간 충돌 발생 시 시스템이 독단적으로 판단하지 말고, 반드시 [CONFLICT WARNING] 플래그와 함께 상충되는 두 관점을 모두 명시하여 사용자에게 판단을 위임할 것."
+            ].join('\n');
 
-            const fullSystemPrompt = `${agentSkillCtx}\n\n${systemPrompt}${internetCtx}${memoryCtx}${designerCtx}${localProjectKnowledgeCtx}${thinkingPartnerCtx}${astraStanceCtx}${secondBrainTraceCtx}\n\n[CONTEXT]\n${brainContext}${brainInventoryCtx}\n${contextBlock}${negativeCtx}`;
+            const fullSystemPrompt = `${agentSkillCtx}\n\n${systemPrompt}${internetCtx}${memoryCtx}${designerCtx}${localProjectKnowledgeCtx}${thinkingPartnerCtx}${astraStanceCtx}${secondBrainTraceCtx}${v4PolicyCtx}\n\n[CONTEXT]\n${brainContext}${brainInventoryCtx}\n${contextBlock}${negativeCtx}`;
             const messagesForRequest: ChatMessage[] = [
                 { role: 'system', content: fullSystemPrompt, internal: true },
                 ...reqMessages