refactor(auth): reorder imports in optional-auth.guard.ts for consistency and readability

backend/src/auth/guards/optional-auth.guard.ts

@@ -1,8 +1,4 @@
-import {
+import { CanActivate, ExecutionContext, Injectable } from "@nestjs/common";
-	CanActivate,
-	ExecutionContext,
-	Injectable,
-} from "@nestjs/common";
 import { ConfigService } from "@nestjs/config";
 import { getIronSession } from "iron-session";
 import { JwtService } from "../../crypto/services/jwt.service";