chore(deps-dev): bump @koa/router from 13.1.1 to 15.0.0

Bumps [@koa/router](https://github.com/koajs/router) from 13.1.1 to 15.0.0.
- [Release notes](https://github.com/koajs/router/releases)
- [Commits](koajs/router@v13.1.1...v15.0.0)

---
updated-dependencies:
- dependency-name: "@koa/router"
  dependency-version: 15.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -141,7 +141,7 @@
     "@elastic/elasticsearch": "^9.0.0",
     "@fastify/formbody": "^8.0.1",
     "@hapi/hapi": "^21.0.0",
-    "@koa/router": "^13.0.1",
+    "@koa/router": "^15.0.0",
     "@types/node": "^24.0.1",
     "ajv": "^8.12.0",
     "apollo-server-core": "^3.0.0",