feat(server): improve indexer (#14698)

fix #13862 


#### PR Dependency Tree


* **PR #14698** 👈

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

* **New Features**
* Enhanced search support for Chinese, Japanese, and Korean languages
with improved text segmentation and character matching.
* Added index management capabilities with table recreation
functionality.

* **Bug Fixes**
* Improved search accuracy for non-Latin scripts through updated
morphology and n-gram configuration.

* **Chores**
  * Added database migration for search index optimization.

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

packages/backend/server/src/data/migrations/1763800000000-rebuild-manticore-mixed-script-indexes.ts

@@ -0,0 +1,12 @@
+import { ModuleRef } from '@nestjs/core';
+import { PrismaClient } from '@prisma/client';
+
+import { IndexerService } from '../../plugins/indexer';
+
+export class RebuildManticoreMixedScriptIndexes1763800000000 {
+  static async up(_db: PrismaClient, ref: ModuleRef) {
+    await ref.get(IndexerService, { strict: false }).rebuildManticoreIndexes();
+  }
+
+  static async down(_db: PrismaClient) {}
+}

packages/backend/server/src/data/migrations/index.ts

@@ -3,3 +3,4 @@ export * from './1703756315970-unamed-account';
 export * from './1721299086340-refresh-unnamed-user';
 export * from './1745211351719-create-indexer-tables';
 export * from './1751966744168-correct-session-update-time';
+export * from './1763800000000-rebuild-manticore-mixed-script-indexes';