fix(rules): apply maneuver AoO damage as a penalty to the maneuver

PF1e (CRB Combat Maneuvers): "If you are hit by the target, you take the
damage normally and apply that amount as a penalty to the attack roll to
perform the maneuver." Capture the provoked AoO's damage in
_execute_maneuver and subtract it from the check total (floored at 0;
natural 20 still succeeds, natural 1 still fails; dropping below 0 hp
still forfeits). Escape and the Improved-feat exemption are untouched.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/pf1e_simulator/combat.py

@@ -3839,10 +3839,16 @@ class CombatEngine:
 
         # PF1e (CRB, Combat Maneuver): attempting the maneuver provokes an
         # attack of opportunity from the target — resolved BEFORE the CMB
-        # check — unless the attacker holds the Improved feat for it. Being
-        # knocked below 0 hp by that AoO forfeits the maneuver.
+        # check — unless the attacker holds the Improved feat for it. Damage
+        # taken from that AoO is applied as a penalty to the maneuver check
+        # (CRB: "apply that amount as a penalty to the attack roll to perform
+        # the maneuver"); being knocked below 0 hp by it forfeits the
+        # maneuver.
+        aoo_damage = 0
         if not self._has_feat(state, _IMPROVED_MANEUVER_FEATS[maneuver]):
+            hp_before = state.hp
             self._maneuver_provoked_aoo(state, target)
+            aoo_damage = max(0, hp_before - state.hp)
             if not state.active:
                 return
 
@@ -3855,7 +3861,15 @@ class CombatEngine:
         attacker_cmb = self._maneuver_cmb(state) - pa_amt
         target_cmd = self._maneuver_cmd(target)
         roll = self._rng.d20()
-        total = roll + attacker_cmb
+        # PF1e (CRB Combat Maneuvers): the provoked-AoO damage rides the
+        # check total (floored at 0); natural 20/1 keep their rules below.
+        total = max(0, roll + attacker_cmb - aoo_damage)
+        if aoo_damage:
+            self._log(
+                f"round {self._current_round} {state.combatant.id}: "
+                f"maneuver AoO dealt {aoo_damage} damage "
+                f"(-{aoo_damage} on the check)"
+            )
         m = _ManeuverRoll(
             roll=roll, attacker_cmb=attacker_cmb, total=total,
             target_cmd=target_cmd,