feat: update core API, database layer, and worker modules

- Remove unused imports (n8n_search, universal_search, Client, Arc, etc.)
- Update API endpoints for identity, face recognition, search
- Fix postgres_db.rs search_videos parent_uuid column
- Add snapshot API and identity agent API
- Clean up backup files (.bak, .bak2)

src/api/middleware.rs

@@ -21,13 +21,27 @@ pub struct ApiState {
     pub db: Arc<PostgresDb>,
 }
 
+const PUBLIC_PATHS: &[&str] = &[
+    "/api/v1/faces/", // Thumbnail paths (partial match)
+];
+
+fn is_public_path(path: &str) -> bool {
+    PUBLIC_PATHS.iter().any(|prefix| path.starts_with(prefix)) && path.ends_with("/thumbnail")
+}
+
 pub async fn api_key_validation(
     State(state): State<ApiState>,
     request: Request,
     next: Next,
 ) -> Response {
+    let path = request.uri().path();
     tracing::info!("[MIDDLEWARE] Starting API key validation");
-    tracing::info!("[MIDDLEWARE] Path: {:?}", request.uri().path());
+    tracing::info!("[MIDDLEWARE] Path: {:?}", path);
+
+    if is_public_path(path) {
+        tracing::info!("[MIDDLEWARE] Public path, skipping auth: {}", path);
+        return next.run(request).await;
+    }
 
     let headers = request.headers();
     tracing::info!("[MIDDLEWARE] All headers: {:?}", headers);