Fix the bots' corner bias; settle seat order and RULES v0.9 (6.2, 6.8)

Bots now pick their start square and break path ties in their own
corner's frame; the absolute tie-break made corners 1 and 2 win 25-28%.
With that fixed, seat order is within target at 4 players, and a +1
stripe first-player bonus (new switch) gains only ~1 point, so no
compensation. RULES.md v0.9 lists the tested alternatives; the plan has
the 6.8 consolidation run and the seat-order study.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

tests/test_metrics.py

@@ -17,7 +17,7 @@ from dojo.events import (
     TurnStarted,
 )
 from dojo.metrics import KUMITE_SECONDS, TURN_SECONDS, GameMetrics, measure, summarize
-from dojo.rules import DEFAULT_RULES, Card
+from dojo.rules import DEFAULT_RULES, Card, RulesConfig
 
 HOME_0 = Pos(0, 1)  # quadrant 0
 
@@ -106,6 +106,16 @@ def test_kiai_decides_a_fight_only_when_the_result_flips_without_it(
     assert summary.exam_kiai_decided_rate == decided
 
 
+def test_first_player_bonus_is_counted_from_the_start() -> None:
+    config = RulesConfig(first_player_bonus=1)
+
+    metrics = measure(
+        [GameOver(None, 1)], config, (0, 1), ("balanced", "farmer"), scenario="t", seed=0
+    )
+
+    assert metrics.final_track == (1, 0)
+
+
 def test_standings_are_sampled_at_turn_ends() -> None:
     metrics = run(
         [