feat: data driven latest archived season number

src/app/api/ratings/archives/[region]/[season]/route.ts

@@ -0,0 +1,12 @@
+import { NextResponse } from 'next/server';
+import { Region } from '../../../../../../constants/regions';
+import { getArchivedRatingsLeaderboard } from '../../../../../../core/blitzkrieg/getArchivedRatingsLeaderboard';
+
+export async function GET(
+  request: Request,
+  { params }: { params: { region: Region; season: number } },
+) {
+  return NextResponse.json(
+    await getArchivedRatingsLeaderboard(params.region, params.season),
+  );
+}

src/app/api/ratings/latest-archived-season-number/route.ts

@@ -0,0 +1,6 @@
+import { NextResponse } from 'next/server';
+import { getArchivedLatestSeasonNumber } from '../../../../core/blitzkrieg/getArchivedLatestSeasonNumber';
+
+export async function GET() {
+  return NextResponse.json(await getArchivedLatestSeasonNumber());
+}