feat: add RssFeed, RssItem, WeatherCache models

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

src/fabledassistant/models/weather_cache.py

@@ -0,0 +1,38 @@
+from datetime import datetime, timezone
+
+from sqlalchemy import DateTime, ForeignKey, Index, Integer, Text, UniqueConstraint
+from sqlalchemy.dialects.postgresql import JSONB
+from sqlalchemy.orm import Mapped, mapped_column
+
+from fabledassistant.models import Base
+
+
+class WeatherCache(Base):
+    __tablename__ = "weather_cache"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    user_id: Mapped[int] = mapped_column(Integer, ForeignKey("users.id", ondelete="CASCADE"))
+    # Unique key per location, e.g. "home", "work", or "event:<uid>"
+    location_key: Mapped[str] = mapped_column(Text)
+    location_label: Mapped[str] = mapped_column(Text, default="")
+    # Current 7-day forecast from Open-Meteo (raw JSON)
+    forecast_json: Mapped[dict | None] = mapped_column(JSONB, nullable=True)
+    # Previous forecast — used to detect changes between fetches
+    previous_json: Mapped[dict | None] = mapped_column(JSONB, nullable=True)
+    fetched_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
+    )
+
+    __table_args__ = (
+        UniqueConstraint("user_id", "location_key", name="uq_weather_cache_user_location"),
+        Index("ix_weather_cache_user_id", "user_id"),
+    )
+
+    def to_dict(self) -> dict:
+        return {
+            "id": self.id,
+            "location_key": self.location_key,
+            "location_label": self.location_label,
+            "forecast_json": self.forecast_json,
+            "fetched_at": self.fetched_at.isoformat(),
+        }