[CORL-649] Migrations (#2597)

* feat: added migration framework

* chore: added premod user status migration

* feat: enhanced error handling of migrations

* fix: added missing argument from abstract method

* fix: another templating blunder

* fix: removed debug code

* feat: enhanced migration tracking

* fix: remove skipping migrations

* feat: moved indexing to migration system

* fix: linting

scripts/migration/create.ts

@@ -0,0 +1,52 @@
+#!/usr/bin/env ts-node
+
+/**
+ * This script can be invoked via:
+ *
+ *   npm run migration:create <migration name>
+ *
+ * To create new database migrations.
+ */
+
+// tslint:disable: no-console
+
+import fs from "fs-extra";
+import lodash from "lodash";
+import path from "path";
+
+const templateFilePath = path.resolve(
+  path.join(
+    __dirname,
+    "../../src/core/server/services/migrate/migration_sample.ts"
+  )
+);
+
+const argv = process.argv.slice(2);
+if (argv.length !== 1) {
+  console.error("usage: npm run migration:create <migration name>");
+  process.exit(1);
+}
+
+// Get the name of the new migration.
+const name = lodash.snakeCase(argv[0]);
+
+// Get the version of the new migration.
+const version = Date.now();
+
+// Get the filePath of the new migration.
+const filePath = path.resolve(
+  path.join(
+    __dirname,
+    `../../src/core/server/services/migrate/migrations/${version}_${name}.ts`
+  )
+);
+
+if (fs.existsSync(filePath)) {
+  console.error(`migration already exists at: ${filePath}`);
+  process.exit(1);
+}
+
+// Write the template out to the file.
+fs.copyFileSync(templateFilePath, filePath);
+
+console.log(`created new migration at: ${filePath}`);