feat(db): drizzle schema (settings, sessions) + boot migrations

server/src/db/index.ts

@@ -0,0 +1,17 @@
+import { Database } from "bun:sqlite";
+import { drizzle } from "drizzle-orm/bun-sqlite";
+import { migrate } from "drizzle-orm/bun-sqlite/migrator";
+import { mkdirSync } from "node:fs";
+import { join } from "node:path";
+import * as schema from "./schema";
+
+export type Db = ReturnType<typeof openDb>;
+
+export function openDb(dataDir: string) {
+  mkdirSync(dataDir, { recursive: true });
+  const sqlite = new Database(join(dataDir, "helios.db"), { create: true });
+  sqlite.exec("PRAGMA journal_mode = WAL");
+  const db = drizzle(sqlite, { schema });
+  migrate(db, { migrationsFolder: join(import.meta.dir, "../../drizzle") });
+  return db;
+}

server/src/db/schema.ts

@@ -0,0 +1,12 @@
+import { integer, sqliteTable, text } from "drizzle-orm/sqlite-core";
+
+export const settings = sqliteTable("settings", {
+  key: text("key").primaryKey(),
+  value: text("value").notNull(),
+});
+
+export const sessions = sqliteTable("sessions", {
+  id: text("id").primaryKey(),
+  createdAt: integer("created_at").notNull(),
+  expiresAt: integer("expires_at").notNull(),
+});