docs(comments): 注释中文化 · internal/runtime/orchestration（29 文件，纯替换）

- 只翻注释/文档字符串：剥离注释后代码行逐字节不变（机械校验只剩允许的行尾注释形态）
- 裁决编号与 design 节号（02.4.3 / 11.4.2 / design/05 §9 等）逐字保留
- 复核：go build 绿；orchestration 及其子包（audit/comm）测试绿；gofmt 干净

internal/runtime/orchestration/orchestration_test.go

@@ -99,7 +99,7 @@ func TestContextIsolation(t *testing.T) {
 		t.Fatalf("Spawn: %v", err)
 	}
 
-	// Mutating the caller's slice after Spawn must not leak into the sub-agent.
+	// Spawn 之后再改调用方的切片，不得泄漏进子代理。
 	specCtx[0].Content[0].Text = "mutated"
 
 	res, err := s.Join(context.Background())
@@ -112,8 +112,8 @@ func TestContextIsolation(t *testing.T) {
 	if m.total != 1 {
 		t.Fatalf("runner calls = %d, want 1", m.total)
 	}
-	// The runner receives the isolated caller context plus the task itself as one
-	// trailing user message (裁决 2026-10-04: 任务作为一条 user 消息注入).
+	// runner 收到的是隔离后的调用方上下文，加上任务本身作为末尾一条 user 消息
+	// （裁决 2026-10-04: 任务作为一条 user 消息注入）.
 	got := m.captured(0)
 	if len(got) != 2 {
 		t.Fatalf("runner received %d messages, want the isolated context + the task message: %#v", len(got), got)
@@ -238,7 +238,7 @@ func TestRunWithRealLoop(t *testing.T) {
 }
 
 func TestNoGoroutineLeak(t *testing.T) {
-	// Not parallel: a goroutine-count assertion is noisy under parallel tests.
+	// 不并行：goroutine 计数断言在并行测试下噪声很大。
 	s := newScheduler(t, Options{MaxParallel: 2})
 	m := &mockRunner{result: &loop.Result{Text: "ok"}}
 	s.runner = m