feat: Implement Alpha list and metrics enhancements

- Added new metrics fields: sub_universe_sharpe, robust_universe_sharpe, two_year_sharpe, prod_correlation, pnl, check_type, and neutralization to the Alpha model.
- Updated snapshot_columns function to derive new metrics and check types from platform snapshots.
- Enhanced API to include failed checks and check types in responses.
- Created migration script to backfill existing Alpha records with new metrics and check types.
- Updated frontend components to display new metrics and allow editing of custom tags.
- Improved filtering and sorting capabilities for new metrics in the Alpha list.
- Added tests for new functionality including checks classification and metrics filtering.

backend/app/models.py

@@ -79,6 +79,13 @@ class Alpha(Base):
     turnover: Mapped[float | None] = mapped_column(Float)
     margin: Mapped[float | None] = mapped_column(Float)
     drawdown: Mapped[float | None] = mapped_column(Float)
+    sub_universe_sharpe: Mapped[float | None] = mapped_column(Float)
+    robust_universe_sharpe: Mapped[float | None] = mapped_column(Float)
+    two_year_sharpe: Mapped[float | None] = mapped_column(Float)
+    prod_correlation: Mapped[float | None] = mapped_column(Float)
+    pnl: Mapped[float | None] = mapped_column(Float)
+    neutralization: Mapped[str | None] = mapped_column(Text)
+    check_type: Mapped[str] = mapped_column(String(20), default="PENDING", server_default="PENDING", index=True)
     date_created: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), index=True)
     date_submitted: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
     synced_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=now)