feat: 新增工作流执行模块

新增流程执行记录的实体、DTO、DAO、控制器和服务层，支持工作流的执行、回调及结果树状列表查询；同时更新服务名称为 ai-agent。

workflow/model/entity/flow_template.go

@@ -0,0 +1,41 @@
+package entity
+
+import (
+	"ai-agent/workflow/consts/flow"
+
+	"gitea.com/red-future/common/beans"
+)
+
+type FlowTemplate struct {
+	beans.SQLBaseDO `orm:",inherit"` // 嵌入基础字段：Id, TenantId, Creator, CreatedAt, Updater, UpdatedAt, DeletedAt
+	// 业务字段
+	FlowTemplateName string                  `orm:"flow_template_name" json:"flowTemplateName" description:"流程模板名称"`
+	Description      string                  `orm:"description" json:"description" description:"流程描述"`
+	CategoryCode     string                  `orm:"category_code" json:"categoryCode" description:"流程分类"`
+	CategoryName     string                  `orm:"category_name" json:"categoryName" description:"流程分类名称"`
+	FlowContent      *FlowInfo               `orm:"flow_content" json:"flowContent" description:"流程内容"`
+	NodeInputParams  []*FlowNode             `orm:"node_input_params" json:"nodeInputParams" description:"节点输入参数"`
+	Status           flow.FlowTemplateStatus `orm:"status" json:"status" description:"流程状态：1启用/0停用"`
+}
+
+type flowTemplateCol struct {
+	beans.SQLBaseCol
+	FlowTemplateName string
+	Description      string
+	CategoryCode     string
+	CategoryName     string
+	FlowContent      string
+	NodeInputParams  string
+	Status           string
+}
+
+var FlowTemplateCol = flowTemplateCol{
+	SQLBaseCol:       beans.DefSQLBaseCol,
+	FlowTemplateName: "flow_template_name",
+	Description:      "description",
+	CategoryCode:     "category_code",
+	CategoryName:     "category_name",
+	FlowContent:      "flow_content",
+	NodeInputParams:  "node_input_params",
+	Status:           "status",
+}