feat: enhance database models with metadata and new resource types

models/scenario.py

@@ -4,11 +4,21 @@ from datetime import date, datetime
 from enum import Enum
 from typing import TYPE_CHECKING, List
 
-from sqlalchemy import Date, DateTime, Enum as SQLEnum, ForeignKey, Integer, Numeric, String, Text
+from sqlalchemy import (
+    Date,
+    DateTime,
+    Enum as SQLEnum,
+    ForeignKey,
+    Integer,
+    Numeric,
+    String,
+    Text,
+)
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 from sqlalchemy.sql import func
 
 from config.database import Base
+from .metadata import ResourceType
 
 if TYPE_CHECKING:  # pragma: no cover
     from .financial_input import FinancialInput
@@ -42,6 +52,9 @@ class Scenario(Base):
     end_date: Mapped[date | None] = mapped_column(Date, nullable=True)
     discount_rate: Mapped[float | None] = mapped_column(Numeric(5, 2), nullable=True)
     currency: Mapped[str | None] = mapped_column(String(3), nullable=True)
+    primary_resource: Mapped[ResourceType | None] = mapped_column(
+        SQLEnum(ResourceType), nullable=True
+    )
     created_at: Mapped[datetime] = mapped_column(
         DateTime(timezone=True), nullable=False, server_default=func.now()
     )