feat(server): skip embedding for deprecated doc ids & empty docs (#13211)

fix AI-367

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

* **Bug Fixes**
* Improved document filtering to exclude settings documents and empty
blobs from embedding and status calculations.
* Enhanced embedding jobs to skip processing deprecated documents if a
newer version exists, ensuring only up-to-date documents are embedded.
* **New Features**
* Added a mutation to trigger the cron job for generating missing
titles.
* **Tests**
* Added test to verify exclusion of documents with empty content from
embedding.
* Updated embedding-related tests to toggle embedding state during
attachment upload under simulated network conditions.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

tests/affine-cloud-copilot/e2e/settings/embedding.spec.ts

@@ -182,6 +182,9 @@ test.describe('AISettings/Embedding', () => {
       uploadThroughput: -1,
     });
 
+    await utils.settings.disableWorkspaceEmbedding(page);
+    await utils.settings.enableWorkspaceEmbedding(page);
+
     await utils.settings.waitForFileEmbeddingReadiness(page, 2);
 
     await utils.settings.closeSettingsPanel(page);