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).

beacon_node/execution_layer/src/test_utils/mock_builder.rs

@@ -12,7 +12,7 @@ use eth2::{
     BeaconNodeHttpClient, CONSENSUS_VERSION_HEADER, CONTENT_TYPE_HEADER, SSZ_CONTENT_TYPE_HEADER,
     Timeouts,
 };
-use fork_choice::{ForkchoiceUpdateParameters, PayloadStatus as FcPayloadStatus};
+use fork_choice::ForkchoiceUpdateParameters;
 use parking_lot::RwLock;
 use sensitive_url::SensitiveUrl;
 use ssz::Encode;
@@ -934,7 +934,6 @@ impl<E: EthSpec> MockBuilder<E> {
             finalized_hash: Some(finalized_execution_hash),
             justified_hash: Some(justified_execution_hash),
             head_root: head_block_root,
-            head_payload_status: FcPayloadStatus::Pending,
         };
 
         let _status = self

beacon_node/execution_layer/src/test_utils/mock_execution_layer.rs

@@ -92,7 +92,6 @@ impl<E: EthSpec> MockExecutionLayer<E> {
         let head_block_root = Hash256::repeat_byte(42);
         let forkchoice_update_params = ForkchoiceUpdateParameters {
             head_root: head_block_root,
-            head_payload_status: fork_choice::PayloadStatus::Pending,
             head_hash: Some(parent_hash),
             justified_hash: None,
             finalized_hash: None,