Author orch Markdown test plan

docs/tests/orch/wait/README.md

@@ -1,7 +1,8 @@
 # Orch `wait` Test Plan Index
 
-## Status
+## Case Files
 
-No command case files are authored yet.
-
-Use [../ROADMAP.md](../ROADMAP.md) for planned case slugs and document progress.
+| Case Slug | File | Coverage Note |
+| --- | --- | --- |
+| `wait-wakes-on-matching-run-event` | [wait-wakes-on-matching-run-event.md](./wait-wakes-on-matching-run-event.md) | wakes on a later matching task event and returns that event payload |
+| `wait-times-out-without-matching-event` | [wait-times-out-without-matching-event.md](./wait-times-out-without-matching-event.md) | returns a stable timeout payload when no later matching event appears |