feat: add OpenAPI support and in-process cron scheduler

- Install @elysia/openapi to auto-generate API docs at /api/openapi
- Install @elysia/cron for in-process scheduled jobs (orphan detection at 2am, storage cleanup at 3am)
- Add Scalar UI docs with 14 tag groups and Bearer JWT security scheme
- Add route-level detail annotations (tags, summaries) to all 30+ route files
- Upgrade crud-builder to accept optional tags config
- Keep HTTP cron endpoint as manual/admin fallback

lib/api/steamgrid-proxy.ts

@@ -2,7 +2,7 @@ import { Elysia, t } from "elysia"
 
 const STEAMGRIDDB_BASE = "https://www.steamgriddb.com/api/v2"
 
-export const steamgridProxyRoutes = new Elysia({ prefix: "/steamgrid" })
+export const steamgridProxyRoutes = new Elysia({ prefix: "/steamgrid", detail: { tags: ["Steam"] } })
   .get(
     "/search",
     async ({ query, set }) => {