CRM-合同：新增合同预览审批流程和提交审核

(cherry picked from commit 41195d5b4a)

src/api/bpm/model/index.ts

@@ -33,6 +33,10 @@ export const getModelApi = async (id: number) => {
   return await request.get({ url: '/bpm/model/get?id=' + id })
 }
 
+export const getModelByKey = async (key: string) => {
+  return await request.get({ url: '/bpm/model/get-by-key?key=' + key })
+}
+
 export const updateModelApi = async (data: ModelVO) => {
   return await request.put({ url: '/bpm/model/update', data: data })
 }