fix: allow parent commands during write delegation

crates/worker/tests/controller_test.rs

@@ -230,7 +230,6 @@ async fn shutdown_closes_bound_workdir_session() {
     let command = session
         .start_command(CommandRequest {
             command: "sleep 30".to_owned(),
-            cwd: None,
             timeout_secs: 60,
             output_limit: 1024,
             tool_call_id: None,
@@ -272,7 +271,6 @@ async fn controller_projects_workdir_command_events_and_snapshot_state() {
     let command = session
         .start_command(CommandRequest {
             command: "printf ready; sleep 0.3; printf done".to_owned(),
-            cwd: None,
             timeout_secs: 5,
             output_limit: 1024,
             tool_call_id: Some("tool-command-1".into()),
@@ -380,7 +378,6 @@ async fn controller_refreshes_command_snapshot_after_high_output_provider_lag()
         .start_command(CommandRequest {
             command: "dd if=/dev/zero bs=8192 count=300 2>/dev/null | tr '\\0' x; sleep 5"
                 .to_owned(),
-            cwd: None,
             timeout_secs: 10,
             output_limit: 1024,
             tool_call_id: Some("tool-high-output".into()),
@@ -455,7 +452,6 @@ async fn controller_startup_failure_closes_bound_workdir_session() {
         session
             .start_command(CommandRequest {
                 command: "printf unreachable".to_owned(),
-                cwd: None,
                 timeout_secs: 5,
                 output_limit: 1024,
                 tool_call_id: None,