Fix resource index conversion and REPL warning (#8654)

Accept __index__ values when converting resource limits and only report PyREPL fallback reasons for terminal-backed interactive sessions.

Assisted-by: Codex:gpt-5

crates/stdlib/src/resource.rs

@@ -175,7 +175,7 @@ mod resource {
     }
 
     fn py2rlim_limit(obj: &PyObject, vm: &VirtualMachine) -> PyResult<host_resource::rlim_t> {
-        let int = obj.try_to_ref::<crate::vm::builtins::PyInt>(vm)?;
+        let int = obj.try_index(vm)?;
         if int.as_bigint().is_negative() {
             return Err(vm.new_value_error("Cannot convert negative int"));
         }

src/lib.rs

@@ -361,7 +361,9 @@ fn run_rustpython(vm: &VirtualMachine, run_mode: RunMode) -> PyResult<()> {
         RunMode::Repl => Ok(()),
     };
     let result = if is_repl || vm.state.config.settings.inspect {
-        warn_if_pyrepl_unavailable(vm);
+        if std::io::stdin().is_terminal() {
+            warn_if_pyrepl_unavailable(vm);
+        }
         shell::run_shell(vm, scope)
     } else {
         res