refactor(db): extract database configuration to separate file

Move database setup logic from index.ts to a dedicated database.ts file for better modularity. Update index.ts to re-export from the new file and adjust import in migrations.ts accordingly.

apps/server/src/db/database.ts

@@ -0,0 +1,13 @@
+import { Database } from "bun:sqlite";
+import { drizzle } from "drizzle-orm/bun-sqlite";
+import * as schema from "./schema";
+
+const sqlite = new Database(process.env.DATABASE_FILENAME ?? "database.db");
+
+// Enable WAL mode for improved performance with concurrent readers
+sqlite.run("PRAGMA journal_mode = WAL;");
+
+export const database = drizzle({
+	client: sqlite,
+	schema: schema,
+});

apps/server/src/db/index.ts

@@ -1,13 +1 @@
-import { Database } from "bun:sqlite";
-import { drizzle } from "drizzle-orm/bun-sqlite";
-import * as schema from "./schema";
-
-const sqlite = new Database(process.env.DATABASE_FILENAME ?? "database.db");
-
-// Enable WAL mode for improved performance with concurrent readers
-sqlite.run("PRAGMA journal_mode = WAL;");
-
-export const database = drizzle({
-	client: sqlite,
-	schema: schema,
-});
+export * from "./database";

apps/server/src/db/migrations.ts

@@ -1,6 +1,6 @@
 import path from "node:path";
 import { migrate } from "drizzle-orm/bun-sqlite/migrator";
-import { database } from ".";
+import { database } from "./database";
 
 async function runMigrations() {
 	// const client = new Database('database.db')