fix: apply pre-commit fixes (remove trailing whitespace) and set date datatype to DataRange object

Author: OscarArroyoVega

services/retriever/src/api.py

@@ -1,5 +1,6 @@
 from loguru import logger
 from fastapi import FastAPI, status
+from datetime import date
 from pydantic import BaseModel
 from typing import Optional
 from src.config import settings
@@ -8,8 +9,8 @@
 
 # Schemas defined inline TODO if API endpoints > 15 move Schemas to schemas file.
 class DataRange(BaseModel):
-    start: str
-    end: str
+    start: date
+    end: date
 
 
 class SQLFilter(BaseModel):