fix: Move HTTPException import to top of file for better code organization

Author: mytherapy-coding

app/main.py

@@ -1,5 +1,5 @@
 """Main FastAPI application entry point."""
-from fastapi import FastAPI
+from fastapi import FastAPI, HTTPException
 from fastapi.exceptions import RequestValidationError
 from fastapi.middleware.cors import CORSMiddleware
 from app.core.config import ALLOWED_ORIGINS
@@ -21,8 +21,6 @@
 )
 
 # Exception handlers
-from fastapi import HTTPException
-
 app.add_exception_handler(RequestValidationError, validation_exception_handler)
 app.add_exception_handler(HTTPException, http_exception_handler)