fix(backups): не повторять импорт после потери ответа

backend/src/services/mikrotik.ts

@@ -784,7 +784,8 @@ export class MikrotikClient {
   async importUploadedFile(fileName: string): Promise<unknown> {
     try {
       return await this.post("/import", { "file-name": fileName }, 120_000)
-    } catch {
+    } catch (error) {
+      if (!(error instanceof MikrotikError) || ![404, 405].includes(error.statusCode)) throw error
       return await this.post("/execute", { script: `/import file-name="${fileName}"` }, 120_000)
     }
   }