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.20.post_attention_layernorm/metrics.json

@@ -0,0 +1 @@
+{"dead_pct": 0.48377978801727295, "fvu": 0.021128201857209206}