feat: Agent采集uptime, 后端持久化kernel/uptime/diskIO, 前端磁盘BPS+IOPS展示

- Agent: system.go 添加 readUptime(), SystemStat 携带 Uptime
- Backend: Server 模型新增 Kernel 字段, ReceiveReport 持久化 kernel+uptime
- Backend: /agent/latest 返回 kernel/uptime/port_info/disk_io_info/disk_total
- Frontend: 磁盘监控改为 BPS+IOPS (4张卡片), 系统信息修复内核/运行时长/监听端口/磁盘容量
- 图表单位从 MB/s 改为 KB/s, 添加 formatBPS 工具函数

backend/internal/models/cicd.go

@@ -3,7 +3,6 @@ package models
 import (
 	"time"
 
-	"gorm.io/gorm"
 )
 
 // Pipeline CI/CD流水线模型
@@ -26,12 +25,11 @@ type Pipeline struct {
 	FailCount   int            `gorm:"default:0" json:"fail_count"`
 	CreatedAt   time.Time      `json:"created_at"`
 	UpdatedAt   time.Time      `json:"updated_at"`
-	DeletedAt   gorm.DeletedAt `gorm:"index" json:"-"`
 }
 
 // TableName 表名
 func (Pipeline) TableName() string {
-	return "pipelines"
+	return "ops_pipelines"
 }
 
 // PipelineRun 流水线运行记录
@@ -81,12 +79,11 @@ type AppRelease struct {
 	Description   string         `gorm:"size:500" json:"description"`
 	CreatedAt     time.Time      `json:"created_at"`
 	UpdatedAt     time.Time      `json:"updated_at"`
-	DeletedAt     gorm.DeletedAt `gorm:"index" json:"-"`
 }
 
 // TableName 表名
 func (AppRelease) TableName() string {
-	return "app_releases"
+	return "deploy_app_releases"
 }
 
 // CreatePipelineRequest 创建流水线请求