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

transfer_observability_test.go

@@ -39,6 +39,7 @@ func (s *transferDelayedWriteStream) Write(p []byte) (int, error) {
 type transferDelayedCommitSink struct {
 	data        []byte
 	writeDelay  time.Duration
+	readDelay   time.Duration
 	syncDelay   time.Duration
 	commitDelay time.Duration
 }
@@ -65,6 +66,7 @@ func (s *transferDelayedCommitSink) WriteAt(p []byte, off int64) (int, error) {
 }
 
 func (s *transferDelayedCommitSink) ReadAt(p []byte, off int64) (int, error) {
+	time.Sleep(s.readDelay)
 	if off < 0 || off >= int64(len(s.data)) {
 		return 0, io.EOF
 	}
@@ -155,6 +157,7 @@ func TestTransferReceiveSessionCommitRecordsTelemetry(t *testing.T) {
 	const (
 		writeDelay  = 4 * time.Millisecond
 		syncDelay   = 3 * time.Millisecond
+		verifyDelay = 5 * time.Millisecond
 		commitDelay = 5 * time.Millisecond
 	)
 	data := []byte("abcdefgh")
@@ -169,6 +172,7 @@ func TestTransferReceiveSessionCommitRecordsTelemetry(t *testing.T) {
 	})
 
 	sink := newTransferDelayedCommitSink(len(data), writeDelay, syncDelay, commitDelay)
+	sink.readDelay = verifyDelay
 	session := newTransferReceiveSession(scope, scope, nil, nil, 0, TransferReceiveOptions{
 		Descriptor: TransferDescriptor{
 			ID:       transferID,
@@ -201,8 +205,8 @@ func TestTransferReceiveSessionCommitRecordsTelemetry(t *testing.T) {
 	if got := snapshot.SyncDuration; got < 3*syncDelay {
 		t.Fatalf("sync duration = %v, want at least %v", got, 3*syncDelay)
 	}
-	if got := snapshot.VerifyDuration; got <= 0 {
-		t.Fatalf("verify duration = %v, want > 0", got)
+	if got := snapshot.VerifyDuration; got < verifyDelay {
+		t.Fatalf("verify duration = %v, want at least %v", got, verifyDelay)
 	}
 	if got := snapshot.CommitDuration; got < commitDelay {
 		t.Fatalf("commit duration = %v, want at least %v", got, commitDelay)