Add pre-merge native stability checks (#21)

* Add pre-merge native stability checks

* Install native binding generator dependencies explicitly

* Pin portal contract fixtures for reproducible CI

shell/ferese-shell/src/media/subscription.rs

@@ -81,6 +81,7 @@ mod tests {
                 ])
                 .env(CHILD, "1")
                 .env("XDG_RUNTIME_DIR", root.path())
+                .env_remove("FERESE_SOCKET")
                 .output()
                 .unwrap();
             assert!(