chore: Various importer improvements (#6519)

* Handle new Notion export format
Clear data on file operation delete

* fix: Don't restart development server on html upload

* fix: Do not send collection created notifications on bulk import

* fix: Avoid parellelizing all uploads at once
Move import into one transaction per-collection

server/queues/tasks/ImportNotionTask.ts

@@ -19,6 +19,19 @@ export default class ImportNotionTask extends ImportTask {
     if (!tree) {
       throw new Error("Could not find valid content in zip file");
     }
+
+    // New Notion exports have a single folder with the name of the export, we must skip this
+    // folder and go directly to the children.
+    if (
+      tree.children.length === 1 &&
+      tree.children[0].children.find((child) => child.title === "index")
+    ) {
+      return this.parseFileTree(
+        fileOperation,
+        tree.children[0].children.filter((child) => child.title !== "index")
+      );
+    }
+
     return this.parseFileTree(fileOperation, tree.children);
   }