feat(server): use native tokenizer impl (#6960)

### Benchmark

`yarn workspace @affine/server-native bench`

```
┌─────────┬────────────┬─────────┬────────────────────┬──────────┬─────────┐
│ (index) │ Task Name  │ ops/sec │ Average Time (ns)  │ Margin   │ Samples │
├─────────┼────────────┼─────────┼────────────────────┼──────────┼─────────┤
│ 0       │ 'tiktoken' │ '5'     │ 176932518.76000002 │ '±4.71%' │ 100     │
│ 1       │ 'native'   │ '16'    │ 61041597.51000003  │ '±0.60%' │ 100     │
└─────────┴────────────┴─────────┴────────────────────┴──────────┴─────────┘
```

packages/backend/server/src/fundamentals/storage/index.ts

@@ -18,7 +18,7 @@ registerStorageProvider('fs', (config, bucket) => {
 })
 export class StorageProviderModule {}
 
-export * from './native';
+export * from '../../native';
 export type {
   BlobInputType,
   BlobOutputType,

packages/backend/server/src/fundamentals/storage/native.ts

@@ -1,32 +0,0 @@
-import { createRequire } from 'node:module';
-
-let serverNativeModule: typeof import('@affine/server-native');
-try {
-  serverNativeModule = await import('@affine/server-native');
-} catch {
-  const require = createRequire(import.meta.url);
-  serverNativeModule =
-    process.arch === 'arm64'
-      ? require('../../../server-native.arm64.node')
-      : process.arch === 'arm'
-        ? require('../../../server-native.armv7.node')
-        : require('../../../server-native.node');
-}
-
-export const mergeUpdatesInApplyWay = serverNativeModule.mergeUpdatesInApplyWay;
-
-export const verifyChallengeResponse = async (
-  response: any,
-  bits: number,
-  resource: string
-) => {
-  if (typeof response !== 'string' || !response || !resource) return false;
-  return serverNativeModule.verifyChallengeResponse(response, bits, resource);
-};
-
-export const mintChallengeResponse = async (resource: string, bits: number) => {
-  if (!resource) return null;
-  return serverNativeModule.mintChallengeResponse(resource, bits);
-};
-
-export const getMime = serverNativeModule.getMime;

packages/backend/server/src/fundamentals/storage/providers/utils.ts

@@ -3,7 +3,7 @@ import { Readable } from 'node:stream';
 import { crc32 } from '@node-rs/crc32';
 import { getStreamAsBuffer } from 'get-stream';
 
-import { getMime } from '../native';
+import { getMime } from '../../../native';
 import { BlobInputType, PutObjectMetadata } from './provider';
 
 export async function toBuffer(input: BlobInputType): Promise<Buffer> {