feat(briefing): weather × calendar cross-reference — rain warnings for outdoor events

src/fabledassistant/services/weather.py

@@ -232,6 +232,32 @@ async def fetch_current_conditions(lat: float, lon: float) -> dict | None:
         return None
 
 
+async def fetch_hourly_precip(lat: float, lon: float) -> dict[str, int]:
+    """Fetch today's hourly precipitation probabilities.
+
+    Returns a dict of ISO hour string → probability percentage, e.g.:
+    {"2026-04-08T14:00": 65, "2026-04-08T15:00": 80, ...}
+    """
+    try:
+        async with httpx.AsyncClient(timeout=10.0) as client:
+            resp = await client.get(OPEN_METEO_URL, params={
+                "latitude": lat,
+                "longitude": lon,
+                "hourly": "precipitation_probability",
+                "forecast_days": 1,
+                "timezone": "auto",
+            })
+            resp.raise_for_status()
+            data = resp.json()
+        hourly = data.get("hourly", {})
+        times = hourly.get("time", [])
+        probs = hourly.get("precipitation_probability", [])
+        return {t: p for t, p in zip(times, probs) if p is not None}
+    except Exception:
+        logger.debug("Failed to fetch hourly precip for %s, %s", lat, lon, exc_info=True)
+        return {}
+
+
 async def _fetch_open_meteo(lat: float, lon: float) -> dict:
     """Fetch 7-day forecast from Open-Meteo with current conditions and yesterday's data."""
     async with httpx.AsyncClient(timeout=15.0) as client: