Expect the unchecked advisory in vlt migration 8 (#2050)

Nightly CI on main has failed every mode_migration_vlt leg (ubuntu x3,
macOS, Windows x2) since #2021. That PR made the vlt warm-tree heal
judge a store entry by vlt's hidden lock alone: without one, the copy
is kept and reported as unchecked ("could not check N installed
copies ... run `vlt ci`"). It updated the rule (c) e2e in
e2e_redirect_vlt_build.rs but missed its twin here, migration test 8,
which removes the hidden lock and still expected the "nothing stale"
advisory. These legs run only at night, so PR and merge-queue CI never
saw it.

Expect advisory_undeterminable(ids.len()), as the rule (c) test does.
The store copies are still kept and the tree stays patched.


Claude-Session: https://claude.ai/code/session_011f9aeQSeGNDaC689NLWPom

Co-authored-by: Claude <noreply@anthropic.com>

Author: mikolalysenko

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

@@ -570,8 +570,10 @@ async fn vlt_pinned_matrix_migration_agent_apply_after_hosted() {
     fx.leg.ran();
 }
 
-/// 8: a hosted scan over an agent-patched warm tree keeps the tree (heal
-/// rule (c) sees the afterHash pass): nothing is invalidated.
+/// 8: a hosted scan over an agent-patched warm tree with no hidden lock
+/// keeps the tree. Hosted scans fetch no patch record, so nothing proves
+/// which bytes the store copy holds: heal rule (c) reports it as
+/// unchecked and asks for `vlt ci`, and nothing is invalidated.
 #[tokio::test(flavor = "multi_thread")]
 #[ignore = "real vlt: SOCKET_PATCH_VLT_E2E_JS"]
 async fn vlt_pinned_matrix_migration_hosted_scan_keeps_agent_patched_tree() {
@@ -586,7 +588,7 @@ async fn vlt_pinned_matrix_migration_hosted_scan_keeps_agent_patched_tree() {
     let _ = std::fs::remove_file(fx.proj.join(HIDDEN_LOCK));
     let ids = fx.store_ids(fx.t());
     let doc = fx.scan(&[]);
-    fx.assert_advisory(&doc, &advisory_nothing_stale());
+    fx.assert_advisory(&doc, &advisory_undeterminable(ids.len()));
     for id in &ids {
         assert!(store_entry(&fx.proj, id).exists(), "{id} kept");
     }