Update tokenizer, configuration and training reports

reports/run/metrics.jsonl

@@ -1027,3 +1027,5 @@
 {"step": 20540, "tokens": 10768875520, "loss": 2.7529842376708986, "tokens_per_second": 993998.8605152208, "lr": 0.0015, "gradient_norm": 0.13833782076835632, "benchmark": false}
 {"step": 20560, "tokens": 10779361280, "loss": 2.7573177337646486, "tokens_per_second": 984597.292859046, "lr": 0.0015, "gradient_norm": 0.14055199921131134, "benchmark": false}
 {"step": 20580, "tokens": 10789847040, "loss": 2.762322998046875, "tokens_per_second": 983528.5535243816, "lr": 0.0015, "gradient_norm": 0.17151477932929993, "benchmark": false}
+{"step": 20600, "tokens": 10800332800, "loss": 2.7454185485839844, "tokens_per_second": 978846.9869995496, "lr": 0.0015, "gradient_norm": 0.16418181359767914, "benchmark": false}
+{"step": 20620, "tokens": 10810818560, "loss": 2.7720109939575197, "tokens_per_second": 988054.4007539555, "lr": 0.0015, "gradient_norm": 0.1813291758298874, "benchmark": false}