Fix missing compat::from_fastly_response conversion in edgezero_main

The merge conflict resolution took PR15's take_finalize_sentinel code
expecting an HttpResponse but left the fastly_response variable unconverted.
Add the missing let mut response = compat::from_fastly_response(fastly_response)
before the sentinel check.

Author: prk-Jr

crates/trusted-server-adapter-fastly/src/main.rs

@@ -236,6 +236,8 @@ fn edgezero_main(mut req: FastlyRequest, config_store: ConfigStoreHandle) {
             }
         };
 
+    let mut response = compat::from_fastly_response(fastly_response);
+
     if !take_finalize_sentinel(&mut response) {
         // Apply finalize headers at the entry point so that router-level
         // 405/404 responses for unregistered HTTP methods (e.g. TRACE, WebDAV