fix(ci,engine): repoint engine tests/benches to iii_helpers::stream and build helpers before SDK type check

Engine integration tests and benches still imported iii_sdk::UpdateOp, which
moved to iii_helpers::stream. The Node CI type-check step now also builds
@iii-dev/helpers so its subpath type declarations resolve.

Author: guibeira

.github/workflows/ci.yml

@@ -545,8 +545,8 @@ jobs:
       #- name: Lint
       #  run: npx @biomejs/biome check sdk/packages/node
 
-      - name: Build observability (prerequisite for type check)
-        run: pnpm --filter @iii-dev/observability build
+      - name: Build helper packages (prerequisite for type check)
+        run: pnpm --filter @iii-dev/observability build && pnpm --filter @iii-dev/helpers build
 
       - name: Type check
         run: pnpm --filter iii-sdk exec tsc --noEmit

engine/benches/kv_store_bench.rs

@@ -5,7 +5,7 @@ use std::{sync::Arc, time::Instant};
 use criterion::{BenchmarkId, Criterion, Throughput, criterion_group, criterion_main};
 use futures::future::join_all;
 use iii::builtins::kv::BuiltinKvStore;
-use iii_sdk::UpdateOp;
+use iii_helpers::stream::UpdateOp;
 use serde_json::json;
 use tokio::runtime::Runtime;
 

engine/benches/state_adapter_bench.rs

@@ -4,7 +4,7 @@ use std::sync::Arc;
 
 use criterion::{Criterion, criterion_group, criterion_main};
 use iii::workers::state::adapters::{StateAdapter, kv_store::BuiltinKvStoreAdapter};
-use iii_sdk::UpdateOp;
+use iii_helpers::stream::UpdateOp;
 use serde_json::json;
 use tokio::runtime::Runtime;
 

engine/tests/state_stream_update_redis_e2e.rs

@@ -19,7 +19,7 @@
 use serde_json::json;
 
 use iii::workers::state::adapters::{StateAdapter, redis_adapter::StateRedisAdapter};
-use iii_sdk::UpdateOp;
+use iii_helpers::stream::UpdateOp;
 
 const SCOPE: &str = "audio::transcripts";