fix(native): ensure buckets use valid references

fhevm-engine/fhevm-go-native/fhevm/api.go

@@ -576,12 +576,13 @@ func (dbApi *EvmStorageComputationStore) InsertComputationBatch(evmStorage Chain
 	// his ciphertexts to be evaluated
 	buckets := make(map[int64][]*ComputationToInsert)
 	// index the buckets
-	for _, comp := range computations {
+	for ind, comp := range computations {
 		if buckets[comp.CommitBlockId] == nil {
 			buckets[comp.CommitBlockId] = make([]*ComputationToInsert, 0)
 		}
-		buckets[comp.CommitBlockId] = append(buckets[comp.CommitBlockId], &comp)
+		buckets[comp.CommitBlockId] = append(buckets[comp.CommitBlockId], &computations[ind])
 	}
+
 	// collect all their keys and sort because golang doesn't traverse map
 	// in deterministic order
 	allKeys := make([]int, 0)