v1.2 scaffold

backend/app/schemas/scenario.py

@@ -0,0 +1,26 @@
+from datetime import datetime
+
+from pydantic import BaseModel, ConfigDict, Field
+
+from app.schemas.product import ProductCostBreakdown
+
+
+class ScenarioCreate(BaseModel):
+    name: str
+    description: str | None = None
+    overrides: dict = Field(default_factory=dict)
+
+
+class ScenarioRead(BaseModel):
+    id: int
+    name: str
+    status: str
+    description: str | None
+    overrides: dict
+    created_at: datetime
+    model_config = ConfigDict(from_attributes=True)
+
+
+class ScenarioRunResponse(BaseModel):
+    scenario: ScenarioRead
+    results: list[ProductCostBreakdown]