chore: ensure full v12 annotations on all ExO SDK methods [DX-910]

- Add missing Template publish/unpublish overloads to MRInternal type
- Fix Template update description: "(upsert)" -> "with PUT"
- Fix Fragment update description: add "with PUT" HTTP semantics

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: michaelphamcf

lib/common-types.ts

@@ -976,6 +976,8 @@ type MRInternal<UA extends boolean> = {
   (opts: MROpts<'Template', 'create', UA>): MRReturn<'Template', 'create'>
   (opts: MROpts<'Template', 'update', UA>): MRReturn<'Template', 'update'>
   (opts: MROpts<'Template', 'delete', UA>): MRReturn<'Template', 'delete'>
+  (opts: MROpts<'Template', 'publish', UA>): MRReturn<'Template', 'publish'>
+  (opts: MROpts<'Template', 'unpublish', UA>): MRReturn<'Template', 'unpublish'>
 
   (opts: MROpts<'UIConfig', 'get', UA>): MRReturn<'UIConfig', 'get'>
   (opts: MROpts<'UIConfig', 'update', UA>): MRReturn<'UIConfig', 'update'>

lib/plain/entities/fragment.ts

@@ -78,7 +78,7 @@ export type FragmentPlainClientAPI = {
   ): Promise<FragmentProps>
 
   /**
-   * Updates a fragment
+   * Updates a fragment with PUT
    * @param params the space, environment, and fragment IDs
    * @param data the fragment data (including sys.version)
    * @returns the updated fragment

lib/plain/entities/template.ts

@@ -78,7 +78,7 @@ export type TemplatePlainClientAPI = {
   ): Promise<TemplateProps>
 
   /**
-   * Updates a template (upsert)
+   * Updates a template with PUT
    * @param params the space, environment, and template IDs
    * @param data the template data (including sys.version)
    * @returns the updated template