fix(v13): V13 审计 6 项修复 — TrajectoryRecorder注册 + industryStore接入 + 知识搜索 + webhook标注 + structured UI + persistent注释

FIX-01: TrajectoryRecorderMiddleware 注册到 create_middleware_chain() (@650优先级)
FIX-02: industryStore 接入 ButlerPanel 行业专长展示 + 自动拉取
FIX-03: 桌面端知识库搜索 saas-knowledge mixin + VikingPanel SaaS KB UI
FIX-04: webhook 迁移标注 deprecated + 添加 down migration 注释
FIX-05: Admin Knowledge 添加结构化数据 Tab (CRUD + 行浏览)
FIX-06: PersistentMemoryStore 精化 dead_code 标注 (完整迁移留后续)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

desktop/src-tauri/src/memory/persistent.rs

@@ -143,7 +143,11 @@ pub struct PersistentMemoryStore {
     conn: Arc<Mutex<SqliteConnection>>,
 }
 
-#[allow(dead_code)] // Legacy: operations migrated to VikingStorage, kept for backward compat
+#[allow(dead_code)]
+// Migration status (V13 audit FIX-06):
+// - ACTIVE: new(), configure_embedding_client() — embedding config path for chat memory search
+// - LEGACY: store(), get(), search(), delete(), stats(), export_all(), import_batch() — data ops moved to VikingStorage
+// - Full removal requires migrating embedding config to VikingStorage (~3h, tracked in AUDIT_TRACKER)
 impl PersistentMemoryStore {
     /// Create a new persistent memory store
     pub async fn new(app_handle: &tauri::AppHandle) -> Result<Self, String> {
@@ -587,7 +591,7 @@ fn sanitize_fts_query(query: &str) -> String {
 }
 
 /// Generate a unique memory ID
-#[allow(dead_code)] // Legacy: kept for potential migration use
+#[allow(dead_code)] // Legacy: VikingStorage generates its own URIs
 pub fn generate_memory_id() -> String {
     let uuid_str = Uuid::new_v4().to_string().replace("-", "");
     let short_uuid = &uuid_str[..8];