PPO_Bot Fire campaign: 3787/3789 wins (99.95%); frozen eval 500/500

Single 3789-round battle (5212-9000), only rounds 1-2 lost (cold start);
last 100 rounds 100%. Frozen-policy eval (PPOB_EVAL_ONLY=1, 500 rounds vs
Fire, counter 9000->9500): 500/500 = 100%, zero train lines, weights mtime
and content untouched. vLoss avg 39.7/max 361 stable throughout — bounded
terminal reward (db99153) holds at cumulative score ~462k.

PPO_Bot/weights/latest/adam_t.txt

@@ -1,13 +1,13 @@
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+324564
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PPO_Bot/weights/round_counter.txt

@@ -1 +1 @@
-5211
+9500