If you look at the base_shortname of the sausage item in the config file, you will see it is "blood".
This is the base item that is reskinned/renamed to look like a sausage.
"sausage": {
"enabled": true,
"base_shortname": "blood",
"skin": 2572182986,
"gathered_from": 19,
"dropWeight": 0,
"max_count": 0,
"imageURL": "https://i.imgur.com/XFrZotc.png",
"market_enable": true,
"market_buy_price": 10.0,
"market_sell_price": 5.0,
"market_quantity": 0
},
If you want it to be edible, change it to an item that can be consumed, such as "chicken.spoiled". This will make any NEW items that are created edible. I recommend doing this on a fresh wipe. Sausages provide no benefit/buff and are used as an ingredient in meals. The meals themselves are all default edible.