Add metrics.json to saes_sql_interp_bm2_cs1_experiment_4.3_syn=True/k=32

saes_sql_interp_bm2_cs1_experiment_4.3_syn=True/k=32/model.layers.4.post_attention_layernorm/metrics.json

@@ -0,0 +1 @@
+{"dead_pct": 0.586904764175415, "fvu": 0.00841532088816166}