feat: adds configurable chunk size for the initial mc level 0 SS stage cost calculation to reduce memory usage

tests/test_bayes_run_with_ss.py

@@ -108,6 +108,7 @@ def test_basic_analysis(snapshot):
 		ss_default_upper_w_log_step=4,
 		ss_dump_last_generation=False,
 		write_output_to_bayesruncsv=False,
+		ss_initial_costs_chunk_size=1000,
 	)
 	result = square_run.go()
 
@@ -150,6 +151,7 @@ def test_bayesss_with_tighter_cost(snapshot):
 		ss_default_upper_w_log_step=4,
 		ss_dump_last_generation=False,
 		write_output_to_bayesruncsv=False,
+		ss_initial_costs_chunk_size=1
 	)
 	result = square_run.go()