refactor: remove unused anchorRoleId parameter from DiscordRoleRepository and decentralize type definitions

package.json

@@ -16,7 +16,8 @@
     "discord.js": "latest",
     "drizzle-orm": "latest",
     "postgres": "latest",
-    "winston": "^3.19.0"
+    "winston": "^3.19.0",
+    "zod": "^4.4.3"
   },
   "devDependencies": {
     "@types/bun": "^1.3.14",