fix(diagnose-command): stop holding a Config borrow across http calls

execute() held &config.borrow() across check_http/check_composer_repo/
check_composer_audit, which reach HttpDownloader -> CurlDownloader::
download; that method does self.config.borrow_mut() on the same
Config RefCell, panicking with "RefCell already borrowed" once the
phpinfo panic that previously masked this was fixed.

Switch those three helpers to take the Rc<RefCell<Config>> handle
(matching check_version's existing pattern) and borrow only where a
field is actually read, so no borrow spans the downstream network
call. Un-ignore the now-passing run_diagnose smoke test and
test_cmd_fail; test_cmd_success stays ignored, now for two separate
reasons: it needs real network access (as the PHP original does), and
shirabe_php_shim::OPENSSL_VERSION_NUMBER is a hardcoded stub (0) that
always trips check_platform's TLSv1.1/1.2 support check regardless of
the real linked OpenSSL, forcing a non-zero exit code.

0 files changed, 0 insertions, 0 deletions