loopd: subagent spawn on the background slot

Co-Authored-By: ornith-1.5-35b-a3b <agent@wntrmute.dev>

crates/loopd/src/scheduler.rs

@@ -136,6 +136,7 @@ impl Scheduler {
                 client: &ctx.client,
                 port: &*ctx.port,
                 registry: &ctx.registry,
+                ctx: Some(ctx),
             };
             let text = format!("It is {}.\n\n{}", now.to_rfc3339(), job.prompt);
             let mut emit = |_event: &TurnEvent| {};
@@ -247,6 +248,7 @@ impl Scheduler {
             client: &ctx.client,
             port: &*ctx.port,
             registry: &ctx.registry,
+            ctx: Some(ctx),
         };
 
         let text = format!("It is {}.\n\n{file}", now.to_rfc3339());