fix: repair healthz mysql check and im tenant creation

- healthz: Scan(new(int)) is not supported by GoFrame, use .One() so
  the mysql check no longer reports a false failure
- im_tenant: set updated_by on insert for both im_tenant and
  im_tenant_config, otherwise new tenant creation fails with
  "Field 'updated_by' doesn't have a default value"
- gitignore: exclude .trae/ local debugging artifacts

server/internal/model/input/sysin/im_tenant.go

@@ -38,6 +38,7 @@ type ImTenantInsertFields struct {
 	DbDsn      string `json:"dbDsn"      dc:"独立连接串"`
 	State      int    `json:"state"      dc:"状态"`
 	CreatedBy  int64  `json:"createdBy"  dc:"创建者"`
+	UpdatedBy  int64  `json:"updatedBy"  dc:"更新者"`
 }
 
 // ImTenantConfigUpdateFields 修改IM租户配置字段过滤