Nightly decision-cost perf drift

[github-actions]

counter	baseline	current	delta	threshold	status
attackable_player_sweeps	555	731	+176	646	FAIL
auto_tap_source_cache_builds	516	118	-398	605	PASS
cached_auto_tap_source_rejects	0	0	+0	64	PASS
cached_auto_tap_source_reuses	509	41	-468	598	PASS
combat_shadow_block_scans	0	0	+0	64	PASS
crew_eligibility_scans	10397	10127	-270	10980	PASS
granted_ability_provider_scans	0	0	+0	64	PASS
layers_escalated	19	26	+7	83	PASS
layers_full_eval	6102	6146	+44	6471	PASS
layers_incremental	246	188	-58	322	PASS
legal_actions_spell_cost_sweeps	516	118	-398	605	PASS
legend_rule_mode_gate_scans	14225	13503	-722	15000	PASS
mana_aura_trigger_scans	10497	9885	-612	11085	PASS
mana_display_sweeps	345	345	+0	426	PASS
mana_display_swept_objects	5996	5996	+0	6359	PASS
priority_cast_probe_builds	516	118	-398	605	PASS
restriction_static_exact_scans	0	0	+0	64	PASS
restriction_static_mode_gate_scans	25694	25133	-561	27042	PASS
sba_battlefield_snapshot_builds	14288	13566	-722	15066	PASS
sba_empty_battlefield_short_circuits	69	69	+0	136	PASS
stack_batch_candidates	0	0	+0	64	PASS
stack_batch_observer_refusals	0	0	+0	64	PASS
stack_batch_plans	0	0	+0	64	PASS
stack_batched_entries	0	0	+0	64	PASS
stack_inert_noop_batches	0	0	+0	64	PASS
stack_inert_noop_entries	0	0	+0	64	PASS
state_clone_for_legality	4419	3997	-422	4703	PASS
static_full_scans	0	0	+0	64	PASS

perf compare: 1 FAIL, 27 PASS, 0 NEW, 0 REMOVED