feat: implement smoketest and extend host provisioning with template linking

- Add runSmoketest mutation to automate end-to-end verification.

- Add SmoketestExecutor and HostDeleter to support automated testing and cleanup.

- Extend createHost and importHosts to allow linking templates by name or ID.

- Update docs/howtos/cookbook.md with new recipe steps and AI/MCP guidance.

- Update .junie/guidelines.md with new verification and deployment standards.

- Add src/test/template_link.test.ts and update existing tests to cover new functionality.

- Regenerate GraphQL types to match schema updates.

src/test/host_importer.test.ts

@@ -71,8 +71,8 @@ describe("HostImporter", () => {
         // Mocking template lookup for deviceType
         (zabbixAPI.post as jest.Mock).mockResolvedValueOnce([{ templateid: "301" }]);
 
-        // Mocking host.create via requestByPath
-        (zabbixAPI.requestByPath as jest.Mock).mockResolvedValueOnce({ hostids: ["401"] });
+        // Mocking host.create via post (called by ZabbixCreateHostRequest)
+        (zabbixAPI.post as jest.Mock).mockResolvedValueOnce({ hostids: ["401"] });
 
         const result = await HostImporter.importHosts(hosts, "token");