Fix schema_export (#2387)

* Fix schema_export.

* Add schema_export to CI.

Author: afck

.github/workflows/rust.yml

@@ -223,3 +223,6 @@ jobs:
       if: '!cancelled()'
       run: |
         ln -sf toolchains/build/rust-toolchain.toml
+    - name: Check linera-service GraphQL schema
+      run: |
+        diff <(cargo run --locked --bin linera-schema-export) linera-service-graphql-client/gql/service_schema.graphql

linera-service/src/schema_export.rs

@@ -164,7 +164,7 @@ async fn main() -> std::io::Result<()> {
     let store_config = MemoryStoreConfig::new(TEST_MEMORY_MAX_STREAM_QUERIES);
     let namespace = "schema_export";
     let root_key = &[];
-    let storage = MemoryStorage::new(store_config, namespace, root_key, None)
+    let storage = MemoryStorage::initialize(store_config, namespace, root_key, None)
         .await
         .expect("storage");
     let config = ChainListenerConfig::default();