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.

mcp/operations/createHost.graphql

@@ -1,5 +1,5 @@
-mutation CreateHost($host: String!, $hostgroupids: [Int!]!, $templateids: [Int!]!) {
-  createHost(host: $host, hostgroupids: $hostgroupids, templateids: $templateids) {
+mutation CreateHost($host: String!, $hostgroupids: [Int!]!, $templateids: [Int], $templateNames: [String]) {
+  createHost(host: $host, hostgroupids: $hostgroupids, templateids: $templateids, templateNames: $templateNames) {
     hostids
     error {
       message

mcp/operations/createVerificationHost.graphql

@@ -1,8 +1,9 @@
-mutation CreateVerificationHost($deviceKey: String!, $deviceType: String!, $groupNames: [String!]!) {
+mutation CreateVerificationHost($deviceKey: String!, $deviceType: String!, $groupNames: [String!]!, $templateNames: [String]) {
   importHosts(hosts: [{
     deviceKey: $deviceKey,
     deviceType: $deviceType,
-    groupNames: $groupNames
+    groupNames: $groupNames,
+    templateNames: $templateNames
   }]) {
     hostid
     message

mcp/operations/importHosts.graphql

@@ -1,5 +1,6 @@
 # Import multiple hosts/devices into Zabbix.
 # This is a powerful tool for bulk provisioning of hosts using their names and types.
+# It supports linking templates by ID (templateids) or by name (templateNames).
 mutation ImportHosts($hosts: [CreateHost!]!) {
   importHosts(hosts: $hosts) {
     hostid

mcp/operations/runSmoketest.graphql

@@ -0,0 +1,14 @@
+# Run a complete smoketest: creates a template, host group, and host,
+# verifies their creation and linkage, and then cleans up everything.
+# Variables: hostName, templateName, groupName
+mutation RunSmoketest($hostName: String!, $templateName: String!, $groupName: String!) {
+  runSmoketest(hostName: $hostName, templateName: $templateName, groupName: $groupName) {
+    success
+    message
+    steps {
+      name
+      success
+      message
+    }
+  }
+}