feat: adapt source and tests to reth 1.11.1 API changes

Port the source and test-utils changes required by the reth 1.11.1 /
Tsuki upgrade (mirrors scroll-tech/rollup-node scroll-tech#500):

- Migrate off the removed spawn / spawn_critical task helpers. pprof
  stays critical via spawn_critical_task; db_maintenance and
  scroll_network_manager use spawn_task to preserve their original
  non-critical behavior (a plain rename to spawn_critical_task would
  silently tear down the node if the network manager returns).
- Implement RpcHandleProvider::rpc_handle_mut on ScrollAddOnsHandle.
- Replace TaskManager with TaskExecutor in the node test harness, and
  build it with TaskExecutor::test() (lightweight 2-thread pools) rather
  than ::default(), which would allocate full CPU-sized pools per node
  and blow up thread counts on high-core CI under --all-features. Move
  the graceful-shutdown closure accordingly.
- Rename TransactionTestContext::transfer_tx_nonce_bytes to
  transfer_tx_bytes_with_nonce.
- Update the sequencer setup() call sites to the new 2-tuple return.
- Regenerate anvil_state.json for the newer anvil serialization
  (adds gas_refund_counter).
- Test stabilizers: bump txpool max_account_slots (with rationale),
  tolerate already-known transactions, wait on block_sequenced instead
  of a fixed sleep, raise integration timeouts to 120s, and run nextest
  with --test-threads 4.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: dghelm

crates/node/src/args.rs

@@ -281,7 +281,7 @@ impl ScrollRollupNodeConfig {
         // Fetch the database from the hydrated config.
         let db = self.database.clone().expect("should hydrate config before build");
         let db_maintenance = DatabaseMaintenance::new(db.clone());
-        ctx.task_executor.spawn_critical_task("db_maintenance", db_maintenance.run());
+        ctx.task_executor.spawn_task(db_maintenance.run());
 
         // Run the database migrations
         if let Some(named) = chain_spec.chain().named() {
@@ -383,8 +383,7 @@ impl ScrollRollupNodeConfig {
             td_constant(chain_spec.chain().named()),
             authorized_signer,
         );
-        ctx.task_executor
-            .spawn_critical_task("scroll_network_manager", scroll_network_manager.run());
+        ctx.task_executor.spawn_task(scroll_network_manager.run());
 
         tracing::info!(target: "scroll::node::args", fcs = ?fcs, payload_building_duration = ?self.sequencer_args.payload_building_duration, "Starting engine driver");
         let engine = Engine::new(Arc::new(engine_api), fcs);

crates/node/src/test_utils/mod.rs

@@ -168,6 +168,8 @@ where
             .set_dev(is_dev)
             .with_txpool(TxPoolArgs {
                 no_local_transactions_propagation,
+                // Raise the per-account slot limit far above the reth default (16) so tests can
+                // queue many transactions from a single wallet without hitting the pool cap.
                 max_account_slots: 16_384,
                 ..Default::default()
             });
@@ -216,7 +218,12 @@ where
 
         let span = span!(Level::INFO, "node", node_index);
         let _enter = span.enter();
-        let task_executor = TaskExecutor::default();
+        // Use the lightweight test runtime (2-thread tokio/rayon pools) rather than
+        // TaskExecutor::default(), which builds full CPU-sized pools per node. setup_engine
+        // creates one executor per node and the integration suite runs several multi-node
+        // fixtures in parallel, so default pools would allocate hundreds of threads on
+        // high-core CI runners.
+        let task_executor = TaskExecutor::test();
         let testing_node = NodeBuilder::new(node_config.clone())
             .with_database(db.clone())
             .with_launch_context(task_executor.clone());