refactor(core): move database schema ownership (#29068)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

packages/core/src/database/schema.sql.ts

@@ -0,0 +1,10 @@
+import { integer } from "drizzle-orm/sqlite-core"
+
+export const Timestamps = {
+  time_created: integer()
+    .notNull()
+    .$default(() => Date.now()),
+  time_updated: integer()
+    .notNull()
+    .$onUpdate(() => Date.now()),
+}