feat(plugin): carry Http\Response across as a materialized value

A response is built for one request and the graph never retains it, so there
is no entity for a handle to point at. The child holds a real instance
instead, revived from the object record the wire carries, and collect() frees
the copy each world holds — which is what that method is for. The
value-object rule rejects the class only because collect() assigns to $this,
so the category comes from an overrides.list entry.

HttpDownloader::get() and copy() answer with one.

Two gaps stay: decodeJson() reaches Composer\Json\JsonFile, which a guard
shadows, and Composer answers a curl request with the CurlResponse subclass
where this port flattens the value into a Response.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/crates/shirabe/src/util/http/response.rs b/crates/shirabe/src/util/http/response.rs
index 4f824baa..d505bde4 100644
--- a/crates/shirabe/src/util/http/response.rs
+++ b/crates/shirabe/src/util/http/response.rs
@@ -21,6 +21,13 @@ impl Response {
         }
     }
 
+    /// The url of the request this response answered. PHP keeps the whole request array in a
+    /// private property with no getter, and the plugin boundary codec needs the url out of it to
+    /// rebuild the value in the child.
+    pub(crate) fn request_url(&self) -> &str {
+        &self.url
+    }
+
     pub fn get_status_code(&self) -> i64 {
         self.code
     }