fix(notify): 修复传输生命周期竞态，完善背压与协议边界

- 完善 stream/bulk DataID 分配、预留和双向命名空间，修复并发打开及 dedicated/shared 回退时的 ID 冲突
- 将收发、回复、恢复任务和 sidecar 绑定原始会话与物理连接，防止重连后的旧消息误操作新连接
- 加强 close/reset 身份校验及实例移除检查，修复 dedicated attach 失败、通道引用和资源回收竞态
- 收紧批量发送器停止准入，确保在途入队完成后统一清理请求、缓冲区和等待者
- 修复 record 满队列死锁、取消时序号消耗及关闭竞态，确保关闭有界并返回真实错误
- 增加协商式 record 逻辑半关闭，保留反向 ACK；通过 reset 传递 RecordFailure，避免背压掩盖原始失败原因
- 补齐帧长度、批次数量、序号溢出和未确认窗口校验，提前拒绝超限数据并按字节预算拆批
- 为入站分发增加全局及单连接的条数、字节预算和阻塞背压，关闭时唤醒等待者，消除正常断连日志噪音
- 完善 bulk 窗口释放失败处理与传输诊断，补充并发、重连、背压、协议边界及真实 TCP 回归覆盖

stream_lifecycle_test.go

@@ -0,0 +1,64 @@
+package notify
+
+import (
+	"context"
+	"errors"
+	"io"
+	"testing"
+)
+
+func TestStreamRuntimeAdoptFailureFinalizesCandidate(t *testing.T) {
+	runtime := newStreamRuntime("cstr")
+	scope := clientFileScope()
+	existing := newStreamHandle(context.Background(), runtime, scope, StreamOpenRequest{
+		StreamID: "duplicate",
+		DataID:   1,
+	}, 0, nil, nil, 0, nil, nil, nil, runtime.configSnapshot())
+	if err := runtime.register(scope, existing); err != nil {
+		t.Fatalf("register existing stream: %v", err)
+	}
+	defer existing.markReset(io.ErrClosedPipe)
+
+	candidate := newStreamHandle(context.Background(), runtime, scope, StreamOpenRequest{
+		StreamID: "duplicate",
+		DataID:   2,
+	}, 0, nil, nil, 0, nil, nil, nil, runtime.configSnapshot())
+	if err := runtime.adopt(scope, candidate); !errors.Is(err, errStreamAlreadyExists) {
+		t.Fatalf("adopt error = %v, want %v", err, errStreamAlreadyExists)
+	}
+	if err := candidate.resetErrSnapshot(); !errors.Is(err, errStreamAlreadyExists) {
+		t.Fatalf("candidate reset error = %v, want %v", err, errStreamAlreadyExists)
+	}
+	select {
+	case <-candidate.Context().Done():
+	default:
+		t.Fatal("failed stream adoption left candidate context active")
+	}
+}
+
+func TestStreamRuntimeStaleFinalizeDoesNotRemoveReplacement(t *testing.T) {
+	runtime := newStreamRuntime("cstr")
+	scope := clientFileScope()
+	old := newStreamHandle(context.Background(), runtime, scope, StreamOpenRequest{
+		StreamID: "reused",
+		DataID:   1,
+	}, 0, nil, nil, 0, nil, nil, nil, runtime.configSnapshot())
+	if err := runtime.register(scope, old); err != nil {
+		t.Fatalf("register old stream: %v", err)
+	}
+	old.markReset(errors.New("old failed"))
+
+	replacement := newStreamHandle(context.Background(), runtime, scope, StreamOpenRequest{
+		StreamID: "reused",
+		DataID:   2,
+	}, 0, nil, nil, 0, nil, nil, nil, runtime.configSnapshot())
+	if err := runtime.register(scope, replacement); err != nil {
+		t.Fatalf("register replacement stream: %v", err)
+	}
+	defer replacement.markReset(io.ErrClosedPipe)
+
+	old.markReset(errors.New("late duplicate reset"))
+	if got, ok := runtime.lookup(scope, "reused"); !ok || got != replacement {
+		t.Fatalf("replacement stream after stale finalize = %p/%v, want %p/true", got, ok, replacement)
+	}
+}