test: give role-only hydration test a non-flaky wall-clock budget

The success-path selected-hydration test used an 80 ms deadline as a
budget-to-finish, which a contended GitHub macOS runner overran, failing
the Test job with a hydration Timeout while every local run passed. The
test asserts observation counts (anchor before hydrate, no large-tree
rewalk), not a latency bound, so widen the budget to the suite's existing
5 s idiom; the count assertions still catch any real rewalk regression.

crates/core/src/live_locator/selected_hydration_tests.rs

@@ -99,7 +99,7 @@ fn role_only_selected_hydration_anchors_before_hydrating_without_rewalking_large
     };
     let request = LocatorResolveRequest {
         selection: LocatorSelection::First,
-        deadline: crate::Deadline::after(80).unwrap(),
+        deadline: crate::Deadline::after(5_000).unwrap(),
         max_raw_depth: 50,
         materialization: LocatorMaterialization::SelectedMatches,
     };