Update tokenizer, configuration and training reports

reports/run/metrics.jsonl

@@ -0,0 +1 @@
+{"step": 20, "tokens": 10485760, "loss": 10.169149780273438, "tokens_per_second": 229485.42681844623, "lr": 1.5e-05, "gradient_norm": 2.205339193344116, "benchmark": false}