fix(data): expose database client to CLI scripts

db/client.ts

@@ -0,0 +1,37 @@
+import { drizzle, type PostgresJsDatabase } from "drizzle-orm/postgres-js";
+import postgres from "postgres";
+
+import * as schema from "@/db/schema";
+
+type Database = PostgresJsDatabase<typeof schema>;
+
+let database: Database | undefined;
+let client: ReturnType<typeof postgres> | undefined;
+
+export function getDb(): Database {
+  const databaseUrl = process.env.DATABASE_URL;
+
+  if (!databaseUrl) {
+    throw new Error(
+      "DATABASE_URL is required for database-backed routes. Copy .env.example to .env and configure it.",
+    );
+  }
+
+  if (!database) {
+    client = postgres(databaseUrl, {
+      max: Number(process.env.DATABASE_POOL_SIZE ?? 10),
+      prepare: false,
+    });
+    database = drizzle(client, { schema });
+  }
+
+  return database;
+}
+
+export async function closeDb(): Promise<void> {
+  await client?.end();
+  client = undefined;
+  database = undefined;
+}
+
+export type { Database };