Remove head_payload_status from ForkchoiceUpdateParameters

head_payload_status is internal fork choice state, not an EL
forkchoiceUpdated parameter. It already lives on CachedHead — source
it directly from get_head() return in recompute_head_at_slot instead
of threading through ForkchoiceUpdateParameters.

Also add TODO(gloas) for parent_head_hash in re-org path (V29 nodes
don't carry execution_status).

testing/execution_engine_integration/src/test_rig.rs

@@ -13,7 +13,7 @@ use execution_layer::{
     LATEST_TAG, PayloadAttributes, PayloadParameters, PayloadStatus,
 };
 use fixed_bytes::FixedBytesExtended;
-use fork_choice::{ForkchoiceUpdateParameters, PayloadStatus as FcPayloadStatus};
+use fork_choice::ForkchoiceUpdateParameters;
 use reqwest::{Client, header::CONTENT_TYPE};
 use sensitive_url::SensitiveUrl;
 use serde_json::{Value, json};
@@ -294,7 +294,6 @@ impl<Engine: GenericExecutionEngine> TestRig<Engine> {
         let finalized_block_hash = ExecutionBlockHash::zero();
         let forkchoice_update_params = ForkchoiceUpdateParameters {
             head_root,
-            head_payload_status: FcPayloadStatus::Pending,
             head_hash: Some(parent_hash),
             justified_hash: Some(justified_block_hash),
             finalized_hash: Some(finalized_block_hash),