fix: require auth for file upload and add 50MB size limit (#87)

* refactor: extract inline middleware from index.ts into separate modules

- Extract update middleware to routes/update.ts
- Extract health middleware and version logic to routes/health.ts
- Extract shutdown logic to services/shutdown.ts
- Extract gateway init to services/gateway-bootstrap.ts
- Remove unused variables, fix duplicate app creation
- Bump version to 0.4.0

index.ts: 260 lines → 80 lines

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: require auth for file upload and add 50MB size limit

Fixes #86

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/server/src/services/auth.ts

@@ -51,7 +51,7 @@ export async function authMiddleware(token: string | null) {
     const path = ctx.path.toLowerCase()
     if (
       path === '/health' ||
-      (!path.startsWith('/api') && !path.startsWith('/v1') && path !== '/webhook')
+      (!path.startsWith('/api') && !path.startsWith('/v1') && path !== '/webhook' && path !== '/upload')
     ) {
       await next()
       return