Update tokenizer, configuration and training reports

reports/run/metrics.jsonl

@@ -1017,3 +1017,5 @@
 {"step": 20340, "tokens": 10664017920, "loss": 2.761567497253418, "tokens_per_second": 982388.4414941983, "lr": 0.0015, "gradient_norm": 0.13982176780700684, "benchmark": false}
 {"step": 20360, "tokens": 10674503680, "loss": 2.7360662460327148, "tokens_per_second": 977945.0388315676, "lr": 0.0015, "gradient_norm": 0.15452997386455536, "benchmark": false}
 {"step": 20380, "tokens": 10684989440, "loss": 2.7244327545166014, "tokens_per_second": 982084.2929775625, "lr": 0.0015, "gradient_norm": 0.14956440031528473, "benchmark": false}
+{"step": 20400, "tokens": 10695475200, "loss": 2.76476993560791, "tokens_per_second": 971121.3641976244, "lr": 0.0015, "gradient_norm": 0.1706211119890213, "benchmark": false}
+{"step": 20420, "tokens": 10705960960, "loss": 2.753704071044922, "tokens_per_second": 980687.0851026584, "lr": 0.0015, "gradient_norm": 0.1481383889913559, "benchmark": false}