build(deps): bump fastify from 5.7.2 to 5.7.4 in /backend (#645)

Bumps [fastify](https://github.com/fastify/fastify) from 5.7.2 to 5.7.4.
- [Release notes](https://github.com/fastify/fastify/releases)
- [Commits](https://github.com/fastify/fastify/compare/v5.7.2...v5.7.4)

---
updated-dependencies:
- dependency-name: fastify
  dependency-version: 5.7.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

backend/package-lock.json

@@ -12,7 +12,7 @@
         "@fastify/type-provider-typebox": "^5.2.0",
         "@types/jest": "^30.0.0",
         "@types/nodemailer": "^7.0.9",
-        "fastify": "^5.7.2",
+        "fastify": "^5.7.4",
         "nodemailer": "^8.0.1",
         "ts-dotenv": "^0.9.1"
       },
@@ -6110,9 +6110,9 @@
       "license": "BSD-3-Clause"
     },
     "node_modules/fastify": {
-      "version": "5.7.2",
-      "resolved": "https://registry.npmjs.org/fastify/-/fastify-5.7.2.tgz",
-      "integrity": "sha512-dBJolW+hm6N/yJVf6J5E1BxOBNkuXNl405nrfeR8SpvGWG3aCC2XDHyiFBdow8Win1kj7sjawQc257JlYY6M/A==",
+      "version": "5.7.4",
+      "resolved": "https://registry.npmjs.org/fastify/-/fastify-5.7.4.tgz",
+      "integrity": "sha512-e6l5NsRdaEP8rdD8VR0ErJASeyaRbzXYpmkrpr2SuvuMq6Si3lvsaVy5C+7gLanEkvjpMDzBXWE5HPeb/hgTxA==",
       "funding": [
         {
           "type": "github",

backend/package.json

@@ -30,7 +30,7 @@
     "@fastify/type-provider-typebox": "^5.2.0",
     "@types/jest": "^30.0.0",
     "@types/nodemailer": "^7.0.9",
-    "fastify": "^5.7.2",
+    "fastify": "^5.7.4",
     "nodemailer": "^8.0.1",
     "ts-dotenv": "^0.9.1"
   },