feat(ql3): establish 3.0 incubation baseline

back/data/schemaMigration.ts

@@ -0,0 +1,40 @@
+import { DataTypes, Model, ModelStatic, Sequelize } from 'sequelize';
+import { sequelize } from '.';
+
+export interface SchemaMigrationAttributes {
+  id: string;
+  checksum: string;
+  applied_at: number;
+}
+
+export interface SchemaMigrationInstance
+  extends Model<SchemaMigrationAttributes, SchemaMigrationAttributes>,
+    SchemaMigrationAttributes {}
+
+export function defineSchemaMigrationModel(
+  database: Sequelize,
+): ModelStatic<SchemaMigrationInstance> {
+  return database.define<SchemaMigrationInstance>(
+    'SchemaMigration',
+    {
+      id: {
+        type: DataTypes.STRING,
+        primaryKey: true,
+      },
+      checksum: {
+        type: DataTypes.STRING,
+        allowNull: false,
+      },
+      applied_at: {
+        type: DataTypes.BIGINT,
+        allowNull: false,
+      },
+    },
+    {
+      tableName: 'SchemaMigrations',
+      timestamps: false,
+    },
+  );
+}
+
+export const SchemaMigrationModel = defineSchemaMigrationModel(sequelize);