fix(common): stop advertising static assets as immutable (#1836)

tools/ci/src/app_proxy.rs

@@ -515,6 +515,14 @@ mod tests {
         assert!(plan[0].repair_existing_metadata);
     }
 
+    #[test]
+    fn uploaded_assets_carry_the_same_policy_the_app_proxy_serves() {
+        assert_eq!(
+            IMMUTABLE_ASSET_CACHE_CONTROL,
+            "public, max-age=31536000, immutable"
+        );
+    }
+
     #[test]
     fn asset_upload_plan_rejects_manifest_entries_missing_on_disk() {
         let temp = tempfile::tempdir().unwrap();