Refactor async functions to synchronous in main.py

- Changed the 'home' and 'predict' route handlers from async to synchronous functions for improved performance and simplicity.

src/main.py

@@ -75,7 +75,7 @@ class TransactionForm(BaseModel):
     merch_long: float = Field(..., description="Merchant longitude")
 
 @app.get("/", response_class=HTMLResponse)
-async def home(request: Request):
+def home(request: Request):
     """Render the home page with the transaction form."""
     return templates.TemplateResponse(
         "index.html",
@@ -83,7 +83,7 @@ async def home(request: Request):
     )
 
 @app.post("/predict", response_class=HTMLResponse)
-async def predict(
+def predict(
     request: Request,
     trans_date_trans_time: str = Form(...),
     cc_num: str = Form(...),