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

client_config.go

@@ -0,0 +1,155 @@
+package notify
+
+import (
+	"context"
+	"time"
+)
+
+func (c *ClientCommon) DebugMode(dmg bool) {
+	c.mu.Lock()
+	c.debugMode = dmg
+	c.mu.Unlock()
+}
+
+func (c *ClientCommon) IsDebugMode() bool {
+	return c.debugMode
+}
+
+// Deprecated: SkipExchangeKey only controls the legacy RSA-based key exchange.
+func (c *ClientCommon) SkipExchangeKey() bool {
+	return c.skipKeyExchange
+}
+
+// Deprecated: SetSkipExchangeKey only controls the legacy RSA-based key exchange.
+func (c *ClientCommon) SetSkipExchangeKey(val bool) {
+	c.skipKeyExchange = val
+}
+
+func (c *ClientCommon) ShowError(std bool) {
+	c.mu.Lock()
+	c.showError = std
+	c.mu.Unlock()
+}
+
+func (c *ClientCommon) SetDefaultLink(fn func(message *Message)) {
+	c.defaultFns = fn
+}
+
+func (c *ClientCommon) SetLink(key string, fn func(*Message)) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	c.linkFns[key] = fn
+}
+
+func (c *ClientCommon) SetFileHandler(fn func(FileEvent)) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	c.onFileEvent = normalizeFileEventCallback(fn)
+}
+
+func (c *ClientCommon) SetFileReceiveDir(dir string) error {
+	return c.getFileReceivePool().setDir(dir)
+}
+
+func (c *ClientCommon) SetTransferResumeStore(store TransferResumeStore) {
+	if runtime := c.getTransferRuntime(); runtime != nil {
+		runtime.setResumeStore(store)
+	}
+}
+
+func (c *ClientCommon) RecoverTransferSnapshots(ctx context.Context) error {
+	if runtime := c.getTransferRuntime(); runtime != nil {
+		return runtime.recover(ctx)
+	}
+	return nil
+}
+
+func (c *ClientCommon) GetMsgEn() func([]byte, []byte) []byte {
+	return c.msgEn
+}
+
+// Deprecated: SetMsgEn overrides the transport codec directly.
+// Prefer UseModernPSKClient or UseLegacySecurityClient.
+func (c *ClientCommon) SetMsgEn(fn func([]byte, []byte) []byte) {
+	c.msgEn = fn
+	c.fastStreamEncode = nil
+	c.fastBulkEncode = nil
+	c.fastPlainEncode = nil
+	c.securityReadyCheck = false
+}
+
+func (c *ClientCommon) GetMsgDe() func([]byte, []byte) []byte {
+	return c.msgDe
+}
+
+// Deprecated: SetMsgDe overrides the transport codec directly.
+// Prefer UseModernPSKClient or UseLegacySecurityClient.
+func (c *ClientCommon) SetMsgDe(fn func([]byte, []byte) []byte) {
+	c.msgDe = fn
+	c.fastStreamEncode = nil
+	c.fastBulkEncode = nil
+	c.fastPlainEncode = nil
+	c.securityReadyCheck = false
+}
+
+func (c *ClientCommon) HeartbeatPeroid() time.Duration {
+	return c.heartbeatPeriod
+}
+
+func (c *ClientCommon) SetHeartbeatPeroid(duration time.Duration) {
+	c.heartbeatPeriod = duration
+}
+
+func (c *ClientCommon) GetSecretKey() []byte {
+	return c.SecretKey
+}
+
+// Deprecated: SetSecretKey injects a raw transport key directly.
+// Prefer UseModernPSKClient or UseLegacySecurityClient.
+func (c *ClientCommon) SetSecretKey(key []byte) {
+	c.SecretKey = key
+	c.securityReadyCheck = len(key) == 0
+	c.skipKeyExchange = true
+}
+
+// Deprecated: RsaPubKey exposes the legacy RSA handshake key. Prefer UseModernPSKClient.
+func (c *ClientCommon) RsaPubKey() []byte {
+	return c.handshakeRsaPubKey
+}
+
+// Deprecated: SetRsaPubKey configures the legacy RSA handshake key. Prefer UseModernPSKClient.
+func (c *ClientCommon) SetRsaPubKey(key []byte) {
+	c.handshakeRsaPubKey = key
+}
+
+func (c *ClientCommon) Stop() error {
+	if !sessionIsAlive(&c.alive) {
+		return nil
+	}
+	c.stopClientSession("recv stop signal from user", nil)
+	return nil
+}
+
+func (c *ClientCommon) StopMonitorChan() <-chan struct{} {
+	return sessionStopChan(c.clientStopContextSnapshot())
+}
+
+func (c *ClientCommon) Status() Status {
+	return sessionStatusValue(&c.mu, &c.status)
+}
+
+func (c *ClientCommon) GetSequenceEn() func(interface{}) ([]byte, error) {
+	return c.sequenceEn
+}
+
+func (c *ClientCommon) SetSequenceEn(fn func(interface{}) ([]byte, error)) {
+	c.sequenceEn = fn
+}
+
+func (c *ClientCommon) GetSequenceDe() func([]byte) (interface{}, error) {
+	return c.sequenceDe
+}
+
+func (c *ClientCommon) SetSequenceDe(fn func([]byte) (interface{}, error)) {
+	c.sequenceDe = fn
+}