feat(ql3): establish 3.0 incubation baseline

back/migrations/0004-run-cancellation-request.ts

@@ -0,0 +1,60 @@
+import { createHash } from 'crypto';
+import { DataTypes } from 'sequelize';
+import { RUN_TABLE } from './0002-run-schema';
+import type { Migration } from './types';
+
+export const RUN_CANCELLATION_REQUEST_INDEX =
+  'runs_status_cancel_requested_idx';
+
+const manifest = {
+  table: RUN_TABLE,
+  columns: {
+    cancel_requested_at_ms: 'bigint null',
+    cancel_reason: 'varchar(32) null',
+  },
+  indexes: [`${RUN_CANCELLATION_REQUEST_INDEX}(status,cancel_requested_at_ms)`],
+};
+
+export const runCancellationRequestManifest = manifest;
+
+export const runCancellationRequestMigration: Migration = {
+  id: '0004-run-cancellation-request',
+  checksum: createHash('sha256').update(JSON.stringify(manifest)).digest('hex'),
+  async up({ queryInterface, transaction }) {
+    const tables = new Set(await queryInterface.showAllTables());
+    if (!tables.has(RUN_TABLE)) return;
+
+    const columns = await queryInterface.describeTable(RUN_TABLE);
+    if (!columns.cancel_requested_at_ms) {
+      await queryInterface.addColumn(
+        RUN_TABLE,
+        'cancel_requested_at_ms',
+        { type: DataTypes.BIGINT, allowNull: true },
+        { transaction },
+      );
+    }
+    if (!columns.cancel_reason) {
+      await queryInterface.addColumn(
+        RUN_TABLE,
+        'cancel_reason',
+        { type: DataTypes.STRING(32), allowNull: true },
+        { transaction },
+      );
+    }
+
+    const currentIndexes = (await queryInterface.showIndex(RUN_TABLE, {
+      transaction,
+    })) as Array<{ name: string }>;
+    if (
+      !currentIndexes.some(
+        (index) => index.name === RUN_CANCELLATION_REQUEST_INDEX,
+      )
+    ) {
+      await queryInterface.addIndex(
+        RUN_TABLE,
+        ['status', 'cancel_requested_at_ms'],
+        { name: RUN_CANCELLATION_REQUEST_INDEX, transaction },
+      );
+    }
+  },
+};