Add chase accounts + chase csv upload

backend/app/models/finance.py

@@ -1,11 +1,24 @@
 from datetime import date, datetime
 
-from sqlalchemy import Date, Numeric, Text, func
-from sqlalchemy.orm import Mapped, mapped_column
+from sqlalchemy import Date, ForeignKey, Numeric, Text, func
+from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from app.database import Base
 
 
+class FinanceAccount(Base):
+    __tablename__ = "finance_accounts"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    name: Mapped[str] = mapped_column(Text, unique=True)
+    account_type: Mapped[str] = mapped_column(Text)
+    created_at: Mapped[datetime] = mapped_column(server_default=func.now())
+
+    transactions: Mapped[list["FinanceTransaction"]] = relationship(
+        back_populates="account"
+    )
+
+
 class FinanceTransaction(Base):
     __tablename__ = "finance_transactions"
 
@@ -14,8 +27,15 @@ class FinanceTransaction(Base):
     amount: Mapped[float] = mapped_column(Numeric(12, 2))
     category: Mapped[str] = mapped_column(Text)
     description: Mapped[str | None] = mapped_column(Text, nullable=True)
+    account_id: Mapped[int | None] = mapped_column(
+        ForeignKey("finance_accounts.id", ondelete="SET NULL"), nullable=True
+    )
     created_at: Mapped[datetime] = mapped_column(server_default=func.now())
 
+    account: Mapped["FinanceAccount | None"] = relationship(
+        back_populates="transactions"
+    )
+
 
 class FinanceSnapshot(Base):
     __tablename__ = "finance_snapshots"