feat(S5): pet rule engine with condition evaluation and cooldown

tests/unit/test_pet_rules.py

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+import time
+from vigilar.pets.rules import PetState, evaluate_condition, evaluate_rule
+
+def test_detected_in_zone_true():
+    state = PetState(pet_id="milo", current_zone="EXTERIOR")
+    assert evaluate_condition({"type": "detected_in_zone", "zone": "EXTERIOR"}, state, time.time()) is True
+
+def test_detected_in_zone_false():
+    state = PetState(pet_id="milo", current_zone="INTERIOR")
+    assert evaluate_condition({"type": "detected_in_zone", "zone": "EXTERIOR"}, state, time.time()) is False
+
+def test_not_seen_in_zone_true():
+    now = time.time()
+    state = PetState(pet_id="milo", current_zone="INTERIOR", last_seen_time=now - 3600)
+    assert evaluate_condition({"type": "not_seen_in_zone", "zone": "EXTERIOR", "minutes": 30}, state, now) is True
+
+def test_not_seen_anywhere():
+    now = time.time()
+    state = PetState(pet_id="milo", last_seen_time=now - 30000)
+    assert evaluate_condition({"type": "not_seen_anywhere", "minutes": 480}, state, now) is True
+
+def test_detected_without_person():
+    assert evaluate_condition({"type": "detected_without_person"}, PetState(pet_id="snek", person_present=False), time.time()) is True
+    assert evaluate_condition({"type": "detected_without_person"}, PetState(pet_id="snek", person_present=True), time.time()) is False
+
+def test_in_zone_longer_than():
+    now = time.time()
+    state = PetState(pet_id="milo", current_zone="EXTERIOR", zone_entry_time=now - 3000)
+    assert evaluate_condition({"type": "in_zone_longer_than", "zone": "EXTERIOR", "minutes": 45}, state, now) is True
+
+def test_evaluate_rule_and_logic():
+    now = time.time()
+    state = PetState(pet_id="milo", current_zone="EXTERIOR", zone_entry_time=now - 3600, person_present=False)
+    rule = {"conditions": [{"type": "detected_in_zone", "zone": "EXTERIOR"}, {"type": "detected_without_person"}]}
+    assert evaluate_rule(rule, state, now) is True
+
+def test_evaluate_rule_one_fails():
+    now = time.time()
+    state = PetState(pet_id="milo", current_zone="INTERIOR", person_present=False)
+    rule = {"conditions": [{"type": "detected_in_zone", "zone": "EXTERIOR"}, {"type": "detected_without_person"}]}
+    assert evaluate_rule(rule, state, now) is False