Version: 0.9.68.dev.260504

后端：
1. 阶段 3 notification 服务边界落地，新增 `cmd/notification`、`services/notification`、`gateway/notification`、`shared/contracts/notification` 和 notification port，按 userauth 同款最小手搓 zrpc 样板收口
2. notification outbox consumer、relay 和 retry loop 迁入独立服务入口，处理 `notification.feishu.requested`，gateway 改为通过 zrpc client 调用 notification
3. 清退旧单体 notification DAO/model/service/provider/runner 和 `service/events/notification_feishu.go`，旧实现不再作为活跃编译路径
4. 修复 outbox 路由归属、dispatch 启动扫描、Kafka topic 探测/投递超时、sending 租约恢复、毒消息 MarkDead 错误回传和 RPC timeout 边界
5. 同步调整 active-scheduler 触发通知事件、核心 outbox handler、MySQL 迁移边界和 notification 配置

文档：
1. 更新微服务迁移计划，将阶段 3 notification 标记为已完成，并明确下一阶段从 active-scheduler 开始

backend/services/notification/sv/channel.go

@@ -0,0 +1,158 @@
+package sv
+
+import (
+	"context"
+	"errors"
+	"strings"
+
+	"github.com/LoveLosita/smartflow/backend/respond"
+	notificationfeishu "github.com/LoveLosita/smartflow/backend/services/notification/internal/feishu"
+	notificationmodel "github.com/LoveLosita/smartflow/backend/services/notification/model"
+	contracts "github.com/LoveLosita/smartflow/backend/shared/contracts/notification"
+	"gorm.io/gorm"
+)
+
+const (
+	channelTestStatusSuccess = "success"
+	channelTestStatusFailed  = "failed"
+)
+
+// GetFeishuWebhook 查询当前用户的飞书 Webhook 触发器配置。
+func (s *Service) GetFeishuWebhook(ctx context.Context, userID int) (contracts.ChannelResponse, error) {
+	if userID <= 0 {
+		return contracts.ChannelResponse{}, respond.ErrUnauthorized
+	}
+	row, err := s.channelStore.GetUserNotificationChannel(ctx, userID, notificationmodel.ChannelFeishuWebhook)
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return contracts.ChannelResponse{
+				Channel:    notificationmodel.ChannelFeishuWebhook,
+				AuthType:   notificationmodel.AuthTypeNone,
+				Configured: false,
+			}, nil
+		}
+		return contracts.ChannelResponse{}, err
+	}
+	return responseFromChannel(row), nil
+}
+
+// SaveFeishuWebhook 幂等保存当前用户的飞书 Webhook 触发器配置。
+func (s *Service) SaveFeishuWebhook(ctx context.Context, userID int, req contracts.SaveFeishuWebhookRequest) (contracts.ChannelResponse, error) {
+	if userID <= 0 {
+		return contracts.ChannelResponse{}, respond.ErrUnauthorized
+	}
+	webhookURL := strings.TrimSpace(req.WebhookURL)
+	if webhookURL == "" {
+		return contracts.ChannelResponse{}, respond.MissingParam
+	}
+	if err := notificationfeishu.ValidateWebhookURL(webhookURL); err != nil {
+		return contracts.ChannelResponse{}, respond.WrongParamType
+	}
+	authType := normalizeAuthType(req.AuthType)
+	bearerToken := strings.TrimSpace(req.BearerToken)
+	if authType == notificationmodel.AuthTypeBearer && bearerToken == "" {
+		return contracts.ChannelResponse{}, respond.MissingParam
+	}
+	row := &notificationmodel.UserNotificationChannel{
+		UserID:      userID,
+		Channel:     notificationmodel.ChannelFeishuWebhook,
+		Enabled:     req.Enabled,
+		WebhookURL:  webhookURL,
+		AuthType:    authType,
+		BearerToken: bearerToken,
+	}
+	if err := s.channelStore.UpsertUserNotificationChannel(ctx, row); err != nil {
+		return contracts.ChannelResponse{}, err
+	}
+	return s.GetFeishuWebhook(ctx, userID)
+}
+
+// DeleteFeishuWebhook 删除当前用户的飞书 Webhook 触发器配置。
+func (s *Service) DeleteFeishuWebhook(ctx context.Context, userID int) error {
+	if userID <= 0 {
+		return respond.ErrUnauthorized
+	}
+	return s.channelStore.DeleteUserNotificationChannel(ctx, userID, notificationmodel.ChannelFeishuWebhook)
+}
+
+// TestFeishuWebhook 发送一条最小业务 JSON 到当前用户配置的飞书 Webhook。
+func (s *Service) TestFeishuWebhook(ctx context.Context, userID int) (contracts.TestResult, error) {
+	if userID <= 0 {
+		return contracts.TestResult{}, respond.ErrUnauthorized
+	}
+	now := s.options.Now()
+	traceID := "trace_feishu_webhook_test"
+	sendResult, sendErr := s.provider.Send(ctx, notificationfeishu.SendRequest{
+		NotificationID: 0,
+		UserID:         userID,
+		TriggerID:      "ast_test_webhook",
+		PreviewID:      "asp_test_webhook",
+		TriggerType:    "manual_test",
+		TargetType:     "notification_channel",
+		TargetID:       0,
+		TargetURL:      "/assistant/00000000-0000-0000-0000-000000000000",
+		MessageText:    "这是一条 SmartFlow 飞书 Webhook 测试消息。",
+		TraceID:        traceID,
+		AttemptCount:   1,
+	})
+	if sendErr != nil {
+		return contracts.TestResult{}, sendErr
+	}
+
+	status := channelTestStatusFailed
+	testErr := strings.TrimSpace(sendResult.ErrorMessage)
+	if sendResult.Outcome == notificationfeishu.SendOutcomeSuccess {
+		status = channelTestStatusSuccess
+		testErr = ""
+	}
+	if sendResult.Outcome == notificationfeishu.SendOutcomeSkipped && testErr == "" {
+		testErr = "飞书 webhook 未配置或未启用"
+	}
+	if err := s.channelStore.UpdateUserNotificationChannelTestResult(ctx, userID, notificationmodel.ChannelFeishuWebhook, status, testErr, now); err != nil {
+		return contracts.TestResult{}, err
+	}
+	channel, err := s.GetFeishuWebhook(ctx, userID)
+	if err != nil {
+		return contracts.TestResult{}, err
+	}
+	return contracts.TestResult{
+		Channel:  channel,
+		Status:   status,
+		Outcome:  string(sendResult.Outcome),
+		Message:  testErr,
+		TraceID:  traceID,
+		SentAt:   now,
+		Skipped:  sendResult.Outcome == notificationfeishu.SendOutcomeSkipped,
+		Provider: notificationfeishu.Channel,
+	}, nil
+}
+
+func responseFromChannel(row *notificationmodel.UserNotificationChannel) contracts.ChannelResponse {
+	if row == nil {
+		return contracts.ChannelResponse{
+			Channel:    notificationmodel.ChannelFeishuWebhook,
+			AuthType:   notificationmodel.AuthTypeNone,
+			Configured: false,
+		}
+	}
+	return contracts.ChannelResponse{
+		Channel:        row.Channel,
+		Enabled:        row.Enabled,
+		Configured:     strings.TrimSpace(row.WebhookURL) != "",
+		WebhookURLMask: notificationfeishu.MaskWebhookURL(row.WebhookURL),
+		AuthType:       normalizeAuthType(row.AuthType),
+		HasBearerToken: strings.TrimSpace(row.BearerToken) != "",
+		LastTestStatus: row.LastTestStatus,
+		LastTestError:  row.LastTestError,
+		LastTestAt:     row.LastTestAt,
+	}
+}
+
+func normalizeAuthType(authType string) string {
+	switch strings.ToLower(strings.TrimSpace(authType)) {
+	case notificationmodel.AuthTypeBearer:
+		return notificationmodel.AuthTypeBearer
+	default:
+		return notificationmodel.AuthTypeNone
+	}
+}