Add FoodLog model and update relationships

Introduces the FoodLog model to track user food consumption, adds relationships between User, FoodItem, and FoodLog, and updates seed.py to include sample FoodLog data. Also fixes route redirection to use the correct blueprint namespace.

seed.py

@@ -1,5 +1,5 @@
 from application import db, app
-from models import User, FoodItem
+from models import User, FoodItem, FoodLog
 
 with app.app_context():
     User.query.delete()
@@ -21,4 +21,7 @@ with app.app_context():
         )
     )
 
+    FoodLog.query.delete()
+    db.session.add(FoodLog(1, 1, 200))
+
     db.session.commit()