build(deps): bump fastify from 5.5.0 to 5.6.0

Bumps [fastify](https://github.com/fastify/fastify) from 5.5.0 to 5.6.0.
- [Release notes](https://github.com/fastify/fastify/releases)
- [Commits](fastify/fastify@v5.5.0...v5.6.0)

---
updated-dependencies:
- dependency-name: fastify
  dependency-version: 5.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -7,7 +7,7 @@
   },
   "dependencies": {
     "bullmq": "5.58.5",
-    "fastify": "5.5.0",
+    "fastify": "5.6.0",
     "ioredis": "5.7.0"
   }
 }