seo: rewrite root / to /en instead of 308 redirect (#210)

* docs(api)!: drop game_state from EV/arb/low-hold reference

Live game state (scores, period, clock) is exclusive to /api/v1/gamestate
and the gamestate stream channel. Remove the game_state row from sample
payloads + schema tables on the EV, arbitrage, and low-hold reference
pages, and add a breaking-change callout pointing readers at gamestate.

BREAKING CHANGE: clients that read game_state off opportunity rows must
fetch /api/v1/gamestate (or subscribe to /api/v1/stream/gamestate) and
join by event_id.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* seo: rewrite root / to /en instead of 308 redirect

Semrush and other crawlers were getting HTTP 308 when hitting
docs.sharpapi.io/ which blocked indexing of the docs home page.
Change the root / from a permanent redirect to a transparent rewrite
so crawlers see the content at the canonical URL.

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: Mlaz-code

vercel.json

@@ -5,7 +5,6 @@
   "cleanUrls": true,
   "ignoreCommand": "git diff --quiet HEAD^ HEAD -- app/ components/ content/ pages/ public/ scripts/ styles/ theme.config.tsx next.config.mjs proxy.ts package.json vercel.json",
   "redirects": [
-    { "source": "/", "destination": "/en", "permanent": true },
     { "source": "/streaming", "destination": "/en/streaming/overview", "permanent": true },
     { "source": "/streaming/overview", "destination": "/en/streaming/overview", "permanent": true },
     { "source": "/streaming/:path*", "destination": "/en/streaming/:path*", "permanent": true },
@@ -33,6 +32,7 @@
     { "source": "/en/sitemap.xml", "destination": "/sitemap.xml", "permanent": true }
   ],
   "rewrites": [
+    { "source": "/", "destination": "/en" },
     { "source": "/ingest/static/:path*", "destination": "https://us-assets.i.posthog.com/static/:path*" },
     { "source": "/ingest/:path+/", "destination": "https://us.i.posthog.com/:path+/" },
     { "source": "/ingest/:path*", "destination": "https://us.i.posthog.com/:path*" }