Workers cache (#22)

* feat(auth): add Cache-Control: private to auth error responses

* feat: enable Workers Cache in wrangler config

* refactor: replace manual caches.default with Workers Cache

* fix: remove unused url variable in fetch handler

* test: update tests for Workers Cache header-based semantics

* style: apply prettier formatting

* chore(deps): bump wrangler

wrangler.example.toml

@@ -1,9 +1,12 @@
 name = "atalaya"
 main = "src/index.ts"
-compatibility_date = "2026-03-17"
+compatibility_date = "2026-07-06"
 compatibility_flags = ["nodejs_compat"]
 workers_dev = false
 
+[cache]
+enabled = true
+
 [assets]
 directory = "./status-page/dist/client/"
 binding = "ASSETS"