fix(server): race condition for sync (#14770)

#### PR Dependency Tree


* **PR #14770** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

## Release Notes

* **New Features**
* Implemented batch processing for calendar synchronization to improve
performance and resource utilization.
* Added distributed locking to prevent concurrent operations in
multi-instance environments.

* **Bug Fixes**
* Improved reliability by preventing duplicate synchronization attempts.

* **Tests**
  * Enhanced test coverage for batch processing and locking mechanisms.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/plugins/indexer/event.ts

@@ -29,21 +29,20 @@ export class IndexerEvent {
     );
   }
 
-  @OnEvent('workspace.updated')
-  async indexWorkspace({ id }: Events['workspace.updated']) {
+  @OnEvent('doc.snapshot.updated')
+  async indexWorkspace({ workspaceId, docId }: Events['doc.snapshot.updated']) {
     if (!this.config.indexer.enabled) {
       return;
     }
 
+    if (workspaceId !== docId) {
+      return;
+    }
+
     await this.queue.add(
       'indexer.indexWorkspace',
-      {
-        workspaceId: id,
-      },
-      {
-        jobId: `indexWorkspace/${id}`,
-        priority: 100,
-      }
+      { workspaceId },
+      { jobId: `indexWorkspace/${workspaceId}`, priority: 100 }
     );
   }