refactor: dedupe bundled plugin entrypoints

src/plugin-sdk/llm-task.ts

@@ -1,6 +1,7 @@
 // Narrow plugin-sdk surface for the bundled llm-task plugin.
 // Keep this list additive and scoped to symbols used under extensions/llm-task.
 
+export { definePluginEntry } from "./core.js";
 export { resolvePreferredOpenClawTmpDir } from "../infra/tmp-openclaw-dir.js";
 export {
   formatThinkingLevels,