cap terminal reward scale (bounded score bonus) and restore single-battle campaigns

computeRoundReward used cumulative totalScore/50 — unbounded in long battles
(vLoss 353 at round 3160 → 25745 by 3871 in the 5841-round attempt). Cap the
score term at 400 before /50: bonus ∈ [0,8], so the critic's value scale stays
stable regardless of battle length and across battle boundaries.

Reverts the 60-round battle chunking (186e005/da2f825): one battle per
campaign for the whole remaining budget; keeps the crash-restart loop, the
mid-battle freeze guard and the end-of-battle counter completeness check.

Cert (5211, single 60-round battle): 59/60 wins (sole loss = cold-start round
1, score 61), vLoss avg 36.1 / max 148.5, gNorm max 596, zero NaN, zero
restarts, counter check passed. Weights persist to round 5211.

PPO_Bot/weights/latest/adam_t.txt

@@ -1,13 +1,13 @@
-134308
-134308
-134308
-134308
-134308
-134308
-134308
-134308
-134308
-134308
-134308
-134308
-134308
+200200
+200200
+200200
+200200
+200200
+200200
+200200
+200200
+200200
+200200
+200200
+200200
+200200