CORS proxy: Reduce /info/refs cache TTL to 5 min

- Was 12 hours, which caused stale clone data when repos got steady traffic

Author: vdavid

cors-proxy/CLAUDE.md

@@ -24,7 +24,7 @@ responses; otherwise just a pass-through proxy.
   `corsProxy`, so the proxy re-adds `https://` when the path doesn't start with `http`. Example:
   `https://proxy-host/github.com/foo/bar.git/info/refs` → upstream `https://github.com/foo/bar.git/info/refs`.
 - **Caching**: GET `/info/refs` v1 responses (no `Git-Protocol` header) are cached via the Cloudflare Cache API with a
-  12-hour TTL (`Cache-Control: public, max-age=43200`). v2 responses are never cached — isomorphic-git uses v2 for
+  5-minute TTL (`Cache-Control: public, max-age=300`). v2 responses are never cached — isomorphic-git uses v2 for
   branch detection then v1 for clone, and caching v2 would poison v1 lookups. `/info/refs` responses to the browser
   include `Cache-Control: no-store` so the browser doesn't cache them either (same v1/v2 concern). POST
   `/git-upload-pack` requests are never cached. The `X-Cache` response header indicates `HIT`, `MISS`, or `NONE` (for

cors-proxy/src/index.ts

@@ -309,7 +309,7 @@ app.all('*', async (c) => {
             const cache = caches.default
             const cacheKey = new Request(targetUrl)
             const cacheHeaders = new Headers(responseHeaders)
-            cacheHeaders.set('Cache-Control', 'public, max-age=43200')
+            cacheHeaders.set('Cache-Control', 'public, max-age=300')
             const cacheResponse = new Response(response.clone().body, {
                 status: response.status,
                 headers: cacheHeaders,