fix: prefix unused context param with underscore in handleI18n to fix TS6133 build error

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

packages/runtime/src/http-dispatcher.ts

@@ -550,7 +550,7 @@ export class HttpDispatcher {
      *   GET /labels/:object/:locale     → getFieldLabels  (both from path)
      *   GET /labels/:object?locale=xx   → getFieldLabels  (locale from query)
      */
-    async handleI18n(path: string, method: string, query: any, context: HttpProtocolContext): Promise<HttpDispatcherResult> {
+    async handleI18n(path: string, method: string, query: any, _context: HttpProtocolContext): Promise<HttpDispatcherResult> {
         const i18nService = await this.getService(CoreServiceName.enum.i18n);
         if (!i18nService) return { handled: true, response: this.error('i18n service not available', 501) };