chore(deps): bump @grpc/grpc-js (#1356)

Bumps the all-npm-backend-security group with 1 update in the /backend directory: [@grpc/grpc-js](https://github.com/grpc/grpc-node).


Updates `@grpc/grpc-js` from 1.14.3 to 1.14.4
- [Release notes](https://github.com/grpc/grpc-node/releases)
- [Commits](https://github.com/grpc/grpc-node/compare/@grpc/grpc-js@1.14.3...@grpc/grpc-js@1.14.4)

---
updated-dependencies:
- dependency-name: "@grpc/grpc-js"
  dependency-version: 1.14.4
  dependency-type: indirect
  dependency-group: all-npm-backend-security
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

backend/package-lock.json

@@ -10,7 +10,6 @@
       "hasInstallScript": true,
       "license": "SEE LICENSE IN LICENSE",
       "dependencies": {
-        "@aws-sdk/client-s3": "3.1065.0",
         "axios": "^1.15.0",
         "bcrypt": "^6.0.0",
         "better-sqlite3": "^12.6.2",
@@ -824,9 +823,9 @@
       }
     },
     "node_modules/@grpc/grpc-js": {
-      "version": "1.14.3",
-      "resolved": "https://registry.npmjs.org/@grpc/grpc-js/-/grpc-js-1.14.3.tgz",
-      "integrity": "sha512-Iq8QQQ/7X3Sac15oB6p0FmUg/klxQvXLeileoqrTRGJYLV+/9tubbr9ipz0GKHjmXVsgFPo/+W+2cA8eNcR+XA==",
+      "version": "1.14.4",
+      "resolved": "https://registry.npmjs.org/@grpc/grpc-js/-/grpc-js-1.14.4.tgz",
+      "integrity": "sha512-k9Dj3DV/itK9D06Y8f190Qgop7/Ui+D0njFV3LHMPwPT75DpXLQohE9Wmz0QElrJnzsjB7KPWiKJbOl7IPDArQ==",
       "license": "Apache-2.0",
       "dependencies": {
         "@grpc/proto-loader": "^0.8.0",