fix: if the proof is being submitted and the server is restarted, the proof gets stuck in pending state

[JuArce]

Description

1. The User A sends a proof and is waiting

2. The zk arcade server is restarted (let's suppose there is a redeploy, or the server crashes)

3. The connection with the batcher is cut

4. The server goes up

5. There are two posibilties

   Case 1: The proof is not sent yet, so the user can bump the fee and finally send the proof
   Case 2: The proof was sent to Ethereum, so the proof is marked as failed (it is a similar case to fix: bumping fee when proof is being submitted to ethereum marks the proof as failed #310)