fix(audit): v5 审计修复 8 项 — 条件编译、安全加固、冗余清理

- N1: Whiteboard Export 动作标注 demo=true
- N2/N3: Director + A2A 通过 #[cfg(feature)] 条件编译隔离
- N4: viking_adapter 文本匹配降级为 LOW（生产路径走 SqliteStorage）
- N5: 移除冗余 compactor_compact_llm Tauri 命令注册
- M3: hand_approve/hand_cancel 添加 hand_id 验证防跨 Hand 审批
- N7: scheduled_task 文档注释标注 PLANNNED
- 新增 COMPREHENSIVE_AUDIT_V5.md 独立审计报告
- 更新 DEEP_AUDIT_REPORT.md 追加修复记录（累计 32 项）

desktop/src-tauri/src/lib.rs

@@ -1466,7 +1466,7 @@ pub fn run() {
             intelligence::compactor::compactor_estimate_messages_tokens,
             intelligence::compactor::compactor_check_threshold,
             intelligence::compactor::compactor_compact,
-            intelligence::compactor::compactor_compact_llm,
+            // compactor_compact_llm removed: redundant with runtime maybe_compact_with_config()
             // Reflection Engine
             intelligence::reflection::reflection_init,
             intelligence::reflection::reflection_record_conversation,