fix: add migration to change green/red/threshold from INTEGER to BIGINT

web/components/ChartCard/TableViz.tsx

@@ -42,7 +42,7 @@ export default function TableViz({ config, rows, onEdit, onDelete }: Props) {
                 <th className="text-right px-2 py-1 text-green-400">Green</th>
               )}
               {config.signal_type !== 'green' && (
-                <th className="text-right px-2 py-1 text-red-400">Red</th>
+                <th className="text-right px-2 py-1 text-red-400">Red (NP)</th>
               )}
             </tr>
           </thead>

web/migrations/004_add_bigint_signals.js

@@ -0,0 +1,12 @@
+/** @type {import('node-pg-migrate').MigrationBuilder} */
+exports.up = (pgm) => {
+  pgm.sql(`ALTER TABLE signals ALTER COLUMN green TYPE bigint`);
+  pgm.sql(`ALTER TABLE signals ALTER COLUMN red TYPE bigint`);
+  pgm.sql(`ALTER TABLE alerts ALTER COLUMN threshold TYPE bigint`);
+};
+
+exports.down = (pgm) => {
+  pgm.sql(`ALTER TABLE alerts ALTER COLUMN threshold TYPE integer`);
+  pgm.sql(`ALTER TABLE signals ALTER COLUMN red TYPE integer`);
+  pgm.sql(`ALTER TABLE signals ALTER COLUMN green TYPE integer`);
+};