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/playability.ts

@@ -141,7 +141,7 @@ export async function recalculatePlayability(gameId: string): Promise<{
   return { gamePlayability: worstStatus, deviceResults: results };
 }
 
-export const playabilityRoutes = new Elysia({ prefix: "/playability" })
+export const playabilityRoutes = new Elysia({ prefix: "/playability", detail: { tags: ["Games"] } })
   // Manual trigger for recalculation (admin/contributor)
   .post("/calculate/:gameId", async ({ params, request, set }) => {
     const guard = await requireContributorOrAdmin(request.headers);