perf: tiktoken count (#1507)

* perf: tiktoken count

* fix: rerank histories

* fix: rerank histories

* update npmrc

packages/service/package.json

@@ -13,7 +13,6 @@
     "decompress": "^4.2.1",
     "domino-ext": "^2.1.4",
     "encoding": "^0.1.13",
-    "fastgpt-js-tiktoken": "^1.0.12",
     "file-type": "^19.0.0",
     "iconv-lite": "^0.6.3",
     "joplin-turndown-plugin-gfm": "^1.0.12",
@@ -29,6 +28,7 @@
     "papaparse": "5.4.1",
     "pdfjs-dist": "4.0.269",
     "pg": "^8.10.0",
+    "tiktoken": "^1.0.15",
     "tunnel": "^0.0.6",
     "turndown": "^7.1.2"
   },