重构了memory.ts，增加了文件写入锁，解决了并行写入导致记忆文件错误的问题； (#4671)

优化了memory.json文件的加载过程，只加载一次，其它涉及图谱的操作均在内存中完成，提高效率；
注意新引入了async-mutex软件包，需要yarn install安装。

package.json

@@ -73,6 +73,7 @@
     "@types/react-infinite-scroll-component": "^5.0.0",
     "@xyflow/react": "^12.4.4",
     "adm-zip": "^0.5.16",
+    "async-mutex": "^0.5.0",
     "color": "^5.0.0",
     "diff": "^7.0.0",
     "docx": "^9.0.2",

yarn.lock

@@ -3942,6 +3942,7 @@ __metadata:
     analytics: "npm:^0.8.16"
     antd: "npm:^5.22.5"
     applescript: "npm:^1.0.0"
+    async-mutex: "npm:^0.5.0"
     axios: "npm:^1.7.3"
     babel-plugin-styled-components: "npm:^2.1.4"
     browser-image-compression: "npm:^2.0.2"
@@ -4477,6 +4478,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"async-mutex@npm:^0.5.0":
+  version: 0.5.0
+  resolution: "async-mutex@npm:0.5.0"
+  dependencies:
+    tslib: "npm:^2.4.0"
+  checksum: 10c0/9096e6ad6b674c894d8ddd5aa4c512b09bb05931b8746ebd634952b05685608b2b0820ed5c406e6569919ff5fe237ab3c491e6f2887d6da6b6ba906db3ee9c32
+  languageName: node
+  linkType: hard
+
 "async@npm:^3.2.3":
   version: 3.2.6
   resolution: "async@npm:3.2.6"