init

app/models/zone.py

@@ -0,0 +1,19 @@
+import uuid
+from datetime import datetime, timezone
+from sqlmodel import SQLModel, Field
+
+
+class Zone(SQLModel, table=True):
+    __tablename__ = "zones"
+
+    id: uuid.UUID = Field(default_factory=uuid.uuid4, primary_key=True)
+    owner_id: uuid.UUID = Field(foreign_key="users.id", index=True)
+    activity_id: uuid.UUID = Field(foreign_key="activities.id")
+    # Polygon stored as WKT text for SQLite compatibility.
+    # For PostgreSQL/PostGIS, a migration can add a GEOMETRY column.
+    polygon_wkt: str  # e.g. "POLYGON((lon lat, lon lat, ...))"
+    area_m2: float
+    defense_level: int = Field(default=1)
+    defense_runs: int = Field(default=0)
+    created_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))
+    last_reinforced_at: datetime | None = None