trival update considering AI reviews

Author: noel2004

crates/l2geth/src/rpc_client.rs

@@ -113,12 +113,12 @@ impl<T: Provider<Network>> ChunkInterpreter for RpcClient<'_, T> {
                 let parent_block = provider
                     .get_block_by_hash(block.header.parent_hash)
                     .await?
-                    .unwrap_or_else(|| {
-                        panic!(
+                    .ok_or_else(|| {
+                        eyre::eyre!(
                             "parent block for block {} should exist",
                             block.header.number
                         )
-                    });
+                    })?;
 
                 (
                     chain_id,

crates/prover-bin/src/zk_circuits_handler/universal.rs

@@ -11,6 +11,8 @@ pub struct UniversalHandler {
     prover: Prover,
 }
 
+/// Safe for current usage as `CircuitsHandler` trait (protected inside of Mutex and NEVER extract
+/// the instance out by `into_inner`)
 unsafe impl Send for UniversalHandler {}
 
 impl UniversalHandler {