fix: remove broken @hey-api/client-fetch plugin reference

CRITICAL FIX: Remove plugins line referencing deleted @hey-api/client-fetch package

- @hey-api/client-fetch was removed from dependencies but config still referenced it
- In @hey-api/openapi-ts ≥0.73.0, fetch client is bundled by default
- Removing plugins line uses default fetch client configuration
- SDK generation, tests, and TypeScript compilation all work correctly

This resolves the blocking configuration conflict that would break SDK generation.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: jellydn

openapi-ts.config.ts

@@ -6,6 +6,5 @@ export default defineConfig({
     output: "generated/sdk",
     name: "MoleculerApi",
     useOptions: true,
-    plugins: ["@hey-api/client-fetch"],
     exportCore: true,
 });