feat(migrate-ts): export the migration runner from the package entry

Author: dmealing

server/typescript/packages/migrate-ts/src/index.ts

@@ -68,3 +68,6 @@ export {
   type D1Binding,
   type WranglerConfig,
 } from "./wrangler-config.js";
+
+// Migration apply+tracking runner (ADR-0016).
+export * from "./runner/index.js";

server/typescript/packages/migrate-ts/test/runner/public-api.test.ts

@@ -0,0 +1,11 @@
+// test/runner/public-api.test.ts
+import { test, expect } from "bun:test";
+import * as mt from "../../src/index.js";
+
+test("runner is exported from the package entry", () => {
+  expect(typeof mt.applyMigrations).toBe("function");
+  expect(typeof mt.rollbackTo).toBe("function");
+  expect(typeof mt.PgHistoryStore).toBe("function");
+  expect(typeof mt.PgExecutor).toBe("function");
+  expect(typeof mt.loadMigrations).toBe("function");
+});