feat(briefing): add past_days/current_weather to Open-Meteo; add parse_weather_card_data()

Also adds get_cached_weather_rows() for parallel gather in briefing pipeline.

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

tests/test_weather_service.py

@@ -54,3 +54,52 @@ def test_detect_forecast_changes_rain_added():
     assert len(changes) == 1
     assert "2026-03-12" in changes[0]
     assert "rain" in changes[0].lower() or "precip" in changes[0].lower()
+
+
+def test_parse_weather_card_data_returns_none_when_stale():
+    """Should return None when cache is older than 24 hours."""
+    from datetime import datetime, timezone, timedelta
+    from unittest.mock import MagicMock
+    from fabledassistant.services.weather import parse_weather_card_data
+
+    cache = MagicMock()
+    cache.fetched_at = datetime.now(timezone.utc) - timedelta(hours=25)
+    cache.forecast_json = {}
+    assert parse_weather_card_data(cache) is None
+
+
+def test_parse_weather_card_data_returns_card_schema():
+    """Should return the correct metadata.weather schema for fresh cache."""
+    from datetime import datetime, timezone, timedelta, date
+    from unittest.mock import MagicMock
+    from fabledassistant.services.weather import parse_weather_card_data
+
+    today = date.today().isoformat()
+    yesterday = (date.today() - timedelta(days=1)).isoformat()
+    tomorrow = (date.today() + timedelta(days=1)).isoformat()
+
+    cache = MagicMock()
+    cache.fetched_at = datetime.now(timezone.utc)
+    cache.location_label = "Berlin, DE"
+    cache.forecast_json = {
+        "current_weather": {"temperature": 12.0, "weathercode": 2},
+        "daily": {
+            "time": [yesterday, today, tomorrow],
+            "temperature_2m_max": [14.0, 16.0, 18.0],
+            "temperature_2m_min": [9.0, 8.0, 10.0],
+            "precipitation_sum": [0.0, 0.0, 1.5],
+            "weathercode": [1, 2, 61],
+            "windspeed_10m_max": [10.0, 12.0, 8.0],
+        }
+    }
+
+    card = parse_weather_card_data(cache)
+    assert card is not None
+    assert card["current_temp"] == 12
+    assert card["condition"] == "Partly cloudy"
+    assert card["today_high"] == 16
+    assert card["today_low"] == 8
+    assert card["yesterday_high"] == 14
+    assert card["yesterday_low"] == 9
+    assert len(card["forecast"]) >= 1
+    assert card["location"] == "Berlin, DE"