test(goal): disarm the seeded goal in the Loader e2e

The goal domain e2e runs over the shipped headless profile, whose base
bundle mounts goal-round-driver. GoalService.create() arms the goal the
fixture seeds, so the driver queued round 1 when the task turn went idle
and the test's headless driver disposed the context mid-round. The
assertions held only while the aborted round's turn/end missed the log
before disposal; an extra await in the agent loop's pre-step path (#6024)
let it land and the test failed deterministically.

Disarm the goal right after creating it. Activation is process-local, so
the persisted goal/change snapshot is unchanged and the driver starts no
round. Also assert a single turn/start, which records a started round
even when disposal aborts it before its turn/end is persisted.

packages/goal/goal/tests/fixtures/domain/seed-goal.ts

@@ -1,4 +1,4 @@
-/** Test-only Loader plugin that creates a goal at the first real step edge. */
+/** Test-only Loader plugin that creates a disarmed goal at the first real step edge. */
 
 import type { Context } from '@deepseek-ai/cordis'
 import type {} from '@deepseek-ai/dsh-goal'
@@ -13,6 +13,10 @@ export function apply(ctx: Context): void {
         objective: 'Prove the composed goal survives in the session log',
         maxGoalRounds: 7,
       })
+      // An armed goal makes the shipped goal-round-driver start a round at
+      // idle, racing the test driver's disposal. Activation is process-local,
+      // so disarming leaves the persisted snapshot unchanged.
+      ctx.goals.disarm(agent)
     }
     return next()
   })

packages/goal/goal/tests/goal.e2e.ts

@@ -48,6 +48,7 @@ describe('goal domain through the production headless profile and process', () =
     })
     expect(result['output']).toBeTypeOf('string')
     expect(result['output']).toContain('CLI tool round trip complete')
+    expect(events.filter(event => event.type === 'turn/start')).toHaveLength(1)
     expect(events.filter(event => event.type === 'turn/end')).toHaveLength(1)
 
     const changes = events.filter(event => event.type === 'goal/change')