fix(rules): set the slumber hex duration to the witch level

PF1e (APG Slumber): the target "remains asleep for a number of rounds equal to the witch's level" (Will negates). _hex_slumber hardcoded 1 round; it now uses the caster's level. The RAW clause that the hex ends when the target takes damage is not modeled (no wake-on-damage hook in the engine) — documented in README. Two behavioral tests pin the failed-save duration (= level) and the saved case.

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

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

tests/test_class_abilities.py

@@ -294,6 +294,44 @@ def test_evil_eye_saved_deals_minus_two_attack_one_round() -> None:
     assert hex_buffs[0].modifiers == (StatModifier(target="attack", value=-2),)
 
 
+def test_slumber_failed_save_puts_target_asleep_for_witch_level() -> None:
+    """APG Slumber: the target "remains asleep for a number of rounds equal to
+    the witch's level". Given: a level-5 witch and a target failing the Will
+    save (d20 2 +4 < DC 14)
+    When: the hex is cast
+    Then: the asleep condition carries rounds_left = 5."""
+    nairda = _combatant("nairda", resources={"hexes": 5})
+    goblin = _combatant("goblin", hp_max=6)
+    engine, me, enemy = _engine(nairda, [goblin], rng_queue=[2])
+
+    engine._execute(
+        me, Action(kind="hex", target_id=enemy[0].combatant.id, hex_name="slumber")
+    )
+
+    asleep = [
+        ac for ac in enemy[0].active_conditions if ac.condition.name == "asleep"
+    ]
+    assert len(asleep) == 1
+    assert asleep[0].rounds_left == 5
+
+
+def test_slumber_saved_leaves_target_awake() -> None:
+    """APG Slumber: Will negates. Given: a target saving (natural 20)
+    When: the hex is cast
+    Then: no asleep condition is applied."""
+    nairda = _combatant("nairda", resources={"hexes": 5})
+    goblin = _combatant("goblin", hp_max=6)
+    engine, me, enemy = _engine(nairda, [goblin], rng_queue=[20])
+
+    engine._execute(
+        me, Action(kind="hex", target_id=enemy[0].combatant.id, hex_name="slumber")
+    )
+
+    assert not any(
+        ac.condition.name == "asleep" for ac in enemy[0].active_conditions
+    )
+
+
 # --- tammara: deeds ---