feat(db): migration mekanizması ve ilk index migration'ı

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "butcem",
-  "version": "0.4.0",
+  "version": "0.5.0",
   "private": true,
   "description": "BÜTÇEM — aile bütçe, cari, birikim, ev stoğu ve akıllı alışveriş uygulaması",
   "engines": {
@@ -21,7 +21,8 @@
     "seed": "tsx --conditions=react-server --env-file=.env.local scripts/seed.ts",
     "seed:reset": "tsx --conditions=react-server --env-file=.env.local scripts/seed.ts --reset",
     "icons": "tsx scripts/generate-icons.ts",
-    "test:integration": "vitest run --config vitest.integration.config.mts"
+    "test:integration": "vitest run --config vitest.integration.config.mts",
+    "migrate": "tsx --conditions=react-server --env-file=.env.local scripts/migrate.ts"
   },
   "dependencies": {
     "@hookform/resolvers": "^7.0.2",