style(app): apply isort format

app.py

@@ -1,20 +1,18 @@
 import asyncio
+from contextlib import asynccontextmanager
 from pathlib import Path
+
 import markdown
-from fastapi import FastAPI, Request, HTTPException
+from config import (BASE_DIR, EMBEDDER_MODEL_DIR, EMBEDDER_MODEL_NAME,
+                    FALLBACK_MODEL_DIR, FALLBACK_MODEL_NAME, HF_TOKEN)
+from fastapi import FastAPI, HTTPException, Request
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.templating import Jinja2Templates
-from contextlib import asynccontextmanager
-
 from manager.dialogue_manager import handle_dialogue
-from rag.rag_manager import chroma_initialized, load_game_docs_from_disk, add_docs, set_embedder
-from models.model_loader import load_fallback_model, load_embedder
+from models.model_loader import load_embedder, load_fallback_model
+from rag.rag_manager import (add_docs, chroma_initialized,
+                             load_game_docs_from_disk, set_embedder)
 from schemas import AskReq, AskRes
-from config import (
-    FALLBACK_MODEL_NAME, FALLBACK_MODEL_DIR,
-    EMBEDDER_MODEL_NAME, EMBEDDER_MODEL_DIR,
-    HF_TOKEN, BASE_DIR
-)
 
 templates = Jinja2Templates(directory="templates")
 model_ready = False