feat: scaffold Hono server with auth and health check

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/auth.ts

@@ -0,0 +1,11 @@
+import { betterAuth } from "better-auth";
+import { apiKey } from "better-auth/plugins";
+import { drizzleAdapter } from "better-auth/adapters/drizzle";
+import { db } from "./db.js";
+
+export const auth = betterAuth({
+  database: drizzleAdapter(db, {
+    provider: "pg",
+  }),
+  plugins: [apiKey()],
+});