fix(server): 修复 Agent 上报访问日志的 bytes_sent 在 Server 入库链路丢失，导致 Zone 概览“已提供的数据总计”长期为 0 的问题。

internal/apps/openflare/agent/observability.go

@@ -19,13 +19,13 @@ import (
 )
 
 const (
-	healthEventStatusActive      = "active"
-	healthEventStatusResolved    = "resolved"
-	healthSeverityInfo           = "info"
-	healthSeverityWarning        = "warning"
-	healthSeverityCritical       = "critical"
-	accessLogPathMaxLength       = 100
-	healthEventMessageMaxLength  = 4096
+	healthEventStatusActive     = "active"
+	healthEventStatusResolved   = "resolved"
+	healthSeverityInfo          = "info"
+	healthSeverityWarning       = "warning"
+	healthSeverityCritical      = "critical"
+	accessLogPathMaxLength      = 100
+	healthEventMessageMaxLength = 4096
 )
 
 // PersistHeartbeatObservability stores profile, snapshots, traffic, access logs, and health events.
@@ -221,6 +221,7 @@ func buildNodeAccessLogRecords(nodeID string, direct []NodeAccessLog, buffered [
 				Host:       strings.TrimSpace(item.Host),
 				Path:       truncateForDatabase(strings.TrimSpace(item.Path), accessLogPathMaxLength),
 				StatusCode: item.StatusCode,
+				BytesSent:  item.BytesSent,
 			}
 			if resolver != nil {
 				record.Region = resolver.Resolve(record.RemoteAddr)

internal/apps/openflare/agent/observability_test.go

@@ -0,0 +1,33 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package agent
+
+import (
+	"testing"
+	"time"
+)
+
+func TestBuildNodeAccessLogRecordsPreservesBytesSent(t *testing.T) {
+	reportedAt := time.Date(2026, 7, 12, 10, 0, 0, 0, time.UTC)
+
+	records, err := buildNodeAccessLogRecords("node-a", []NodeAccessLog{
+		{
+			LoggedAtUnix: reportedAt.Unix(),
+			RemoteAddr:   "203.0.113.10",
+			Host:         "api.example.com",
+			Path:         "/v1/ping",
+			StatusCode:   200,
+			BytesSent:    4096,
+		},
+	}, nil, reportedAt)
+	if err != nil {
+		t.Fatalf("buildNodeAccessLogRecords() error = %v", err)
+	}
+	if len(records) != 1 {
+		t.Fatalf("expected one access log record, got %d", len(records))
+	}
+	if records[0].BytesSent != 4096 {
+		t.Fatalf("BytesSent = %d, want 4096", records[0].BytesSent)
+	}
+}