added partner model

added import script for reading partners from csv files

gso/cli/imports.py

@@ -221,9 +221,7 @@ def import_partners(file_path: str = typer.Argument(..., help="Path to the CSV f
     try:
         for partner in partners:
             if partner.get("created_at"):
-                partner["created_at"] = datetime.strptime(partner["created_at"], "%Y-%m-%d").replace(
-                    tzinfo=UTC
-                )
+                partner["created_at"] = datetime.strptime(partner["created_at"], "%Y-%m-%d").replace(tzinfo=UTC)
 
             new_partner = PartnerTable(**partner)
             db.session.add(new_partner)