feat(notify): 重构通信内核并补齐 stream/bulk/record/transfer 能力

- 引入 LogicalConn/TransportConn 分层，ClientConn 保留兼容适配层
  - 新增 Stream、Bulk、RecordStream 三条数据面能力及对应控制路径
  - 完成 transfer/file 传输内核与状态快照、诊断能力
  - 补齐 reconnect、inbound dispatcher、modern psk 等基础模块
  - 增加大规模回归、并发与基准测试覆盖
  - 更新依赖库

file_scope.go

@@ -0,0 +1,86 @@
+package notify
+
+import (
+	"strconv"
+	"strings"
+)
+
+const (
+	defaultFileScope           = "default"
+	clientFileDomain           = "client"
+	serverFileDomain           = "server"
+	serverTransportScopeSuffix = "#tg:"
+)
+
+func normalizeFileScope(scope string) string {
+	cleaned := strings.TrimSpace(scope)
+	if cleaned == "" {
+		return defaultFileScope
+	}
+	return cleaned
+}
+
+func clientFileScope() string {
+	return clientFileDomain
+}
+
+func serverFileScope(peer any) string {
+	logical := logicalConnFromPeer(peer)
+	if logical == nil {
+		return serverFileDomain + ":unknown"
+	}
+	id := strings.TrimSpace(logical.ID())
+	if id == "" {
+		return serverFileDomain + ":unknown"
+	}
+	return serverFileDomain + ":" + id
+}
+
+func serverTransportScope(peer any) string {
+	logical := logicalConnFromPeer(peer)
+	if logical == nil {
+		return serverFileDomain + ":unknown"
+	}
+	return serverTransportScopeByGeneration(logical, logical.transportGenerationSnapshot())
+}
+
+func serverTransportScopeForTransport(transport *TransportConn) string {
+	if transport == nil {
+		return serverFileDomain + ":unknown"
+	}
+	return transport.transportScope()
+}
+
+func serverTransportScopeByGeneration(peer any, generation uint64) string {
+	base := serverFileScope(peer)
+	if generation == 0 {
+		return base
+	}
+	return base + serverTransportScopeSuffix + strconv.FormatUint(generation, 10)
+}
+
+func serverTransportDeliveryScopes(peer any) []string {
+	logical := logicalConnFromPeer(peer)
+	if logical == nil {
+		return []string{serverFileDomain + ":unknown"}
+	}
+	base := serverFileScope(logical)
+	transport := serverTransportScope(logical)
+	if transport == base {
+		return []string{base}
+	}
+	return []string{transport, base}
+}
+
+func serverTransportDeliveryScopesForTransport(transport *TransportConn) []string {
+	if transport == nil {
+		return []string{serverFileDomain + ":unknown"}
+	}
+	return transport.deliveryScopes()
+}
+
+func scopeBelongsToServerFileScope(scope string, base string) bool {
+	scope = normalizeFileScope(scope)
+	base = normalizeFileScope(base)
+	return scope == base || strings.HasPrefix(scope, base+serverTransportScopeSuffix)
+}