Bump version to 0.2.4

Critical fix for v0.2.3 startup crash (missing modules in Docker
image). Also refreshes vendored Keysat client to v0.2.0 ahead of
in-app buy flow.

startos/versions/v0.2.4.ts

@@ -0,0 +1,12 @@
+import { VersionInfo } from '@start9labs/start-sdk'
+
+export const v_0_2_4 = VersionInfo.of({
+  version: '0.2.4:0',
+  releaseNotes: {
+    en_US: 'Critical fix: v0.2.3 was crashing at startup with ERR_MODULE_NOT_FOUND because the Dockerfile only copied server/index.js + server/license.js explicitly, missing the new modules added during the refactor (util, gemini-helpers, audio, ytdlp, cookies, config, license-middleware, history, library). Now copies all server/*.js. Also bumps the vendored @keysat/licensing-client to v0.2.0 (adds policySlug + listPublicPolicies for the upcoming in-app buy flow).',
+  },
+  migrations: {
+    up: async ({ effects }) => {},
+    down: async ({ effects }) => {},
+  },
+})