build(deps-dev): bump typescript from 5.7.3 to 5.8.3 in /backend

---
updated-dependencies:
- dependency-name: typescript
  dependency-version: 5.8.3
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

backend/package-lock.json

@@ -38,7 +38,7 @@
         "jest": "^29.7.0",
         "ts-jest": "^29.2.6",
         "tsx": "^4.19.3",
-        "typescript": "^5.7.3"
+        "typescript": "^5.8.3"
       }
     },
     "node_modules/@ampproject/remapping": {
@@ -8638,9 +8638,9 @@
       }
     },
     "node_modules/typescript": {
-      "version": "5.7.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.7.3.tgz",
-      "integrity": "sha512-84MVSjMEHP+FQRPy3pX9sTVV/INIex71s9TL2Gm5FG/WG1SqXeKyZ0k7/blY/4FdOzI12CBy1vGc4og/eus0fw==",
+      "version": "5.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.8.3.tgz",
+      "integrity": "sha512-p1diW6TqL9L07nNxvRMM7hMMw4c5XOo/1ibL4aAIGmSAt9slTE1Xgw5KWuof2uTOvCg9BY7ZRi+GaF+7sfgPeQ==",
       "dev": true,
       "license": "Apache-2.0",
       "bin": {

backend/package.json

@@ -40,7 +40,7 @@
     "jest": "^29.7.0",
     "ts-jest": "^29.2.6",
     "tsx": "^4.19.3",
-    "typescript": "^5.7.3"
+    "typescript": "^5.8.3"
   },
   "dependencies": {
     "@fastify/type-provider-typebox": "^5.1.0",