build(deps): bump fastify from 5.3.2 to 5.8.3

Bumps [fastify](https://github.com/fastify/fastify) from 5.3.2 to 5.8.3.
- [Release notes](https://github.com/fastify/fastify/releases)
- [Commits](fastify/fastify@v5.3.2...v5.8.3)

---
updated-dependencies:
- dependency-name: fastify
  dependency-version: 5.8.3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

package.json

@@ -110,7 +110,7 @@
     "class-transformer": "0.5.1",
     "class-validator": "0.15.1",
     "devlop": "1.1.0",
-    "fastify": "5.3.2",
+    "fastify": "5.8.3",
     "passport": "0.7.0",
     "passport-github2": "0.1.12",
     "passport-google-oauth20": "2.0.0",