feat(server): trigger workspace embedding (#12328)

fix AI-127

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

- **New Features**
  - Added automated event handling for workspace updates and document embedding, streamlining document embedding workflows.
  - Introduced detection and queuing of documents needing embedding, excluding ignored documents.
- **Improvements**
  - Enhanced performance of embedding-related searches by filtering results at the database level.
  - Increased concurrency for embedding job processing to improve throughput.
- **Bug Fixes**
  - Improved error handling and fallback for missing document titles during embedding.
  - Added safeguards to skip invalid embedding jobs based on document identifiers.
- **Tests**
  - Expanded test coverage for document embedding and ignored document filtering.
  - Updated end-to-end tests to use dynamic content for improved reliability.
  - Added synchronization waits in document creation utilities to improve test stability.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

tests/affine-cloud-copilot/e2e/utils/editor-utils.ts

@@ -334,6 +334,8 @@ export class EditorUtils {
         await page.keyboard.press('Enter');
       }
     }
+    // sleep 1 sec to wait the doc sync
+    await page.waitForTimeout(1000);
   }
 
   public static async createTagAndDoc(
@@ -362,6 +364,8 @@ export class EditorUtils {
         await page.keyboard.press('Enter');
       }
     }
+    // sleep 1 sec to wait the doc sync
+    await page.waitForTimeout(1000);
   }
 
   public static async selectElementInEdgeless(page: Page, elements: string[]) {