feat(Q1): highlight reel event scoring and FFmpeg clip assembly

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/unit/test_reel.py

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+import datetime
+import time
+import pytest
+from vigilar.highlights.reel import score_event, select_top_events
+from vigilar.constants import EventType
+from vigilar.storage.queries import insert_event
+from vigilar.config import HighlightsConfig
+
+def test_score_pet_escape():
+    assert score_event(EventType.PET_ESCAPE, {}) == 10
+
+def test_score_wildlife_predator():
+    assert score_event(EventType.WILDLIFE_PREDATOR, {}) == 9
+
+def test_score_person_detected():
+    assert score_event(EventType.PERSON_DETECTED, {}) == 4
+
+def test_score_unknown_returns_zero():
+    assert score_event(EventType.MOTION_START, {}) == 0
+
+def test_score_pet_high_motion():
+    assert score_event(EventType.PET_DETECTED, {"motion_confidence": 0.9}) == 6
+
+def test_score_pet_normal():
+    assert score_event(EventType.PET_DETECTED, {"motion_confidence": 0.3}) == 1
+
+def test_select_top_events(test_db):
+    today = datetime.date.today()
+    insert_event(test_db, EventType.PET_ESCAPE, "ALERT", source_id="cam1", payload={"pet_name": "Angel"})
+    insert_event(test_db, EventType.PERSON_DETECTED, "WARNING", source_id="cam1")
+    insert_event(test_db, EventType.WILDLIFE_PREDATOR, "CRITICAL", source_id="cam2", payload={"species": "bear"})
+    insert_event(test_db, EventType.MOTION_START, "WARNING", source_id="cam1")
+    config = HighlightsConfig(max_clips=3)
+    events_list = select_top_events(test_db, today, config)
+    assert len(events_list) <= 3
+    assert events_list[0]["type"] in (EventType.PET_ESCAPE, EventType.WILDLIFE_PREDATOR)