Fix Ekubo Pricer key

[akiraonstarknet]

Using EKUBO-USDT as Ekubo pricer key in tokens.json, is causing failure at coinbase API. either its unknown key or coinbase doesnt support EKUBO. Since we dont need this key now, I hardcoded a diff value, but needs to be fixed for safety.

[ShantelPeters]

Please can i work on this ?

[akiraonstarknet]

@ShantelPeters please share your understanding and approach to solve the issue. If you need to talk, reach out to me on tg @akiraonstarknet

[ShantelPeters]

I will approach to solve the issue with the following;

1. Remove EKUBO-USDT from tokens.json.
2. Replace with a supported key (e.g., a stablecoin like USDT-USD).
3. Verify the new key works with Coinbase API.
4. Consider implementing a dynamic key update mechanism to avoid hardcoding.
   @akiraonstarknet please I’ll love to be assigned to this issue .

[JoE11-y]

@akiraonstarknet can I get a chance on this?