feat: add health checks, OG image generation, and R2 integration

- Implement health check system with caching and singleflight pattern
- Add OG image generation via Satori with R2 storage backend
- Configure Railway deployment with health check endpoint
- Add connection pooling and Unix socket support for Bun SSR
- Block external access to internal routes (/internal/*)

web/svelte.config.js

@@ -4,7 +4,7 @@ import { vitePreprocess } from "@sveltejs/vite-plugin-svelte";
 /** @type {import('@sveltejs/kit').Config} */
 const config = {
   preprocess: vitePreprocess(),
-
+  inlineStyleThreshold: 1000,
   kit: {
     adapter: adapter({
       out: "build",