Fix bcrypt compatibility for Render

Author: Uttam Singh

backend/requirements.txt

@@ -5,7 +5,8 @@ psycopg2-binary==2.9.9
 python-dotenv==1.0.1
 pydantic==2.9.2
 pydantic-settings==2.6.1
-passlib[bcrypt]==1.7.4
+passlib==1.7.4
+bcrypt==4.1.2
 python-multipart==0.0.9
 requests==2.32.3
 apscheduler==3.10.4