fix: adapt code to modernized libraries

- Migrate validation.ts from class-transformer/class-validator to Zod
- Apply Biome auto-fixes (import sorting, nodejs protocol)
- Fix duplicate type identifier in validation.ts

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/packetFilter.ts

@@ -1,4 +1,4 @@
-import { Transform, TransformCallback } from "stream";
+import { Transform, TransformCallback } from "node:stream";
 
 /**
  * Transform stream untuk memfilter audio packets yang terlalu kecil