Expect native path separators in scan headers

scan_hosted_paths_run_once_per_project_directory compared the
per-directory `== apps/a ==` header against a literal forward-slash
path, but scan prints the directory glob matched, which Windows
spells `apps\a`. The Windows test leg failed on this since 62f07c7,
and because every e2e job waits on `test`, the whole e2e tier was
skipped on v5 PRs. Build the expected header from path components.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AfGnDQMy2FvpExneXmR1qp

Author: claude

crates/socket-patch-cli/tests/covgap_commands_scan_mod.rs

@@ -1484,8 +1484,9 @@ async fn scan_hosted_paths_run_once_per_project_directory() {
 
     let (code, stdout, stderr) = run_scan_human(tmp.path(), &mock.uri(), &["apps/*"]);
     assert_eq!(code, 0, "stdout={stdout}; stderr={stderr}");
-    for app in ["apps/a", "apps/b"] {
-        let header = format!("== {} ==", std::path::Path::new(app).display());
+    // glob rebuilds matches with the native separator (`apps\a` on Windows).
+    for app in ["a", "b"] {
+        let header = format!("== {} ==", Path::new("apps").join(app).display());
         assert!(stdout.contains(&header), "missing {header:?}: {stdout}");
     }
     assert_eq!(stdout.matches("Redirected 0 packages").count(), 2, "{stdout}");