fix: add graphql-query as devDependency of server-test for runtime sub-path resolution

The cli-e2e tests spawn child processes that need to resolve
@constructive-io/graphql-query/runtime via NODE_PATH. Adding the
package as a devDependency so pnpm creates a symlink in
server-test/node_modules, making the exports field accessible.

Author: pyramation

graphql/server-test/package.json

@@ -32,6 +32,7 @@
     "@0no-co/graphql.web": "^1.2.0",
     "@agentic-kit/ollama": "^1.0.3",
     "@constructive-io/graphql-codegen": "workspace:^",
+    "@constructive-io/graphql-query": "workspace:^",
     "@types/express": "^5.0.6",
     "@types/pg": "^8.18.0",
     "@types/supertest": "^7.2.0",