feat: add notification microservices and transactional outbox

scripts/copy-legacy-entry.js

@@ -0,0 +1,13 @@
+const { copyFileSync, existsSync } = require('node:fs');
+const { join } = require('node:path');
+
+const projectRoot = join(__dirname, '..');
+const legacyBundle = join(projectRoot, 'dist', 'legacy', 'src', 'main.js');
+const legacyShim = join(projectRoot, 'scripts', 'legacy-main.js');
+const legacyEntry = join(projectRoot, 'dist', 'main.js');
+
+if (!existsSync(legacyBundle)) {
+  throw new Error(`Legacy monolith bundle not found: ${legacyBundle}`);
+}
+
+copyFileSync(legacyShim, legacyEntry);