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.

frontend/src/style.css

@@ -301,6 +301,9 @@ label:not(.semi-checkbox):not(.semi-radio) {
 .columns-picker {
   padding: var(--space-3);
   min-width: 192px;
+  max-height: min(420px, 50dvh);
+  overflow-y: auto;
+  overscroll-behavior: contain;
 }
 .columns-picker > strong {
   display: block;