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.

docs/howtos/cookbook.md

@@ -140,14 +140,15 @@ Execute the `importTemplates` mutation to create the template and items automati
 Verify that the new type is available and correctly mapped by creating a test host and querying it.
 
 #### 1. Create a Test Host
-Use the `importHosts` mutation (or `createHost` if IDs are already known) to create a host and explicitly set its `deviceType` to `DistanceTrackerDevice`.
+Use the `importHosts` mutation (or `createHost` if IDs are already known) to create a host. Set its `deviceType` to `DistanceTrackerDevice` and link it to the `DISTANCE_TRACKER` template (created in Step 3) using the `templateNames` parameter.
 
 ```graphql
-mutation CreateTestDistanceTracker($host: String!, $groupNames: [String!]!) {
+mutation CreateTestDistanceTracker($host: String!, $groupNames: [String!]!, $templateNames: [String]) {
   importHosts(hosts: [{
     deviceKey: $host,
     deviceType: "DistanceTrackerDevice",
-    groupNames: $groupNames
+    groupNames: $groupNames,
+    templateNames: $templateNames
   }]) {
     hostid
     message
@@ -209,8 +210,8 @@ For more details on the input fields, see the [Reference: createHost](../../sche
 AI agents should prefer using the `importHosts` MCP tool for provisioning as it allows using names for host groups instead of IDs.
 
 ```graphql
-mutation CreateNewHost($host: String!, $groups: [Int!]!, $templates: [Int!]!) {
-  createHost(host: $host, hostgroupids: $groups, templateids: $templates) {
+mutation CreateNewHost($host: String!, $groups: [Int!]!, $templates: [Int], $templateNames: [String]) {
+  createHost(host: $host, hostgroupids: $groups, templateids: $templates, templateNames: $templateNames) {
     hostids
     error {
       message

docs/howtos/maintenance.md

@@ -12,8 +12,14 @@ The project uses [GraphQL Codegen](https://the-guild.dev/graphql/codegen) to gen
 - **Generated Output**: `src/schema/generated/graphql.ts`
 
 #### How to Regenerate Types
-Whenever you modify any `.graphql` files in the `schema/` directory, you must regenerate the TypeScript types:
+Whenever you modify any `.graphql` files in the `schema/` directory, you must regenerate the TypeScript types.
 
+For a one-off update (e.g. in a script or before commit):
+```bash
+npx graphql-codegen --config codegen.ts
+```
+
+If you are a developer and want to watch for schema changes continuously:
 ```bash
 npm run codegen
 ```