chore(deps): bump bcryptjs and @types/bcryptjs in /backend

Bumps [bcryptjs](https://github.com/dcodeIO/bcrypt.js) and [@types/bcryptjs](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/bcryptjs). These dependencies needed to be updated together.

Updates `bcryptjs` from 2.4.3 to 3.0.3
- [Release notes](https://github.com/dcodeIO/bcrypt.js/releases)
- [Commits](dcodeIO/bcrypt.js@2.4.3...v3.0.3)

Updates `@types/bcryptjs` from 2.4.6 to 3.0.0
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/bcryptjs)

---
updated-dependencies:
- dependency-name: bcryptjs
  dependency-version: 3.0.3
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: "@types/bcryptjs"
  dependency-version: 3.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

backend/package-lock.json

@@ -44,7 +44,7 @@
     "@types/multer": "^2.1.0",
     "@types/uuid": "^10.0.0",
     "archiver": "^7.0.1",
-    "bcryptjs": "^2.4.3",
+    "bcryptjs": "^3.0.3",
     "bip39": "^3.1.0",
     "bullmq": "^5.76.2",
     "cookie-parser": "^1.4.7",
@@ -75,7 +75,7 @@
   "devDependencies": {
     "@stellar/stellar-sdk": "^14.5.0",
     "@types/archiver": "^7.0.0",
-    "@types/bcryptjs": "^2.4.6",
+    "@types/bcryptjs": "^3.0.0",
     "@types/express": "^5.0.6",
     "@types/express-rate-limit": "^5.1.3",
     "@types/jest": "^30.0.0",