🔨 migrate slope chart configs (#4275)

Slope chart migrations that go hand in hand with the new designs.

Will be shipped earlier so that configs in R2 are already updated once the new code is deployed.

db/migration/1733850063207-RemoveColorDimensionFromSlopeCharts.ts

@@ -0,0 +1,32 @@
+import { MigrationInterface, QueryRunner } from "typeorm"
+
+export class RemoveColorDimensionFromSlopeCharts1733850063207
+    implements MigrationInterface
+{
+    public async up(queryRunner: QueryRunner): Promise<void> {
+        // remove color dimension for all slope charts
+        // the y-dimension always comes first and the color dimension second,
+        // so it's safe to keep the first dimension only
+        await queryRunner.query(`
+            -- sql
+            UPDATE chart_configs
+            SET
+                patch = JSON_REPLACE(patch, '$.dimensions', JSON_ARRAY(patch -> '$.dimensions[0]')),
+                full = JSON_REPLACE(full, '$.dimensions', JSON_ARRAY(full -> '$.dimensions[0]'))
+            WHERE
+                chartType = 'SlopeChart'
+        `)
+
+        // remove the color dimension for slope charts from the chart_dimensions table
+        await queryRunner.query(`
+            -- sql
+            DELETE cd FROM chart_dimensions cd
+            JOIN charts c ON c.id = cd.chartId
+            JOIN chart_configs cc ON c.configId = cc.id
+            WHERE cc.chartType = 'SlopeChart' AND cd.property = 'color'
+        `)
+    }
+
+    // eslint-disable-next-line @typescript-eslint/no-empty-function
+    public async down(): Promise<void> {}
+}