major update

app/models/fundamental.py

@@ -1,6 +1,6 @@
 from datetime import datetime
 
-from sqlalchemy import DateTime, Float, ForeignKey
+from sqlalchemy import DateTime, Float, ForeignKey, Text
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from app.database import Base
@@ -20,5 +20,8 @@ class FundamentalData(Base):
     fetched_at: Mapped[datetime] = mapped_column(
         DateTime(timezone=True), nullable=False
     )
+    unavailable_fields_json: Mapped[str] = mapped_column(
+        Text, nullable=False, default="{}"
+    )
 
     ticker = relationship("Ticker", back_populates="fundamental_data")