fix: add postHookActions to boot-md test fixture

The InternalHookEvent interface now requires postHookActions (added by
this PR). The boot-md test's makeEvent helper was missing it, causing
a tsc error that fails CI.

src/hooks/bundled/boot-md/handler.test.ts

@@ -37,6 +37,7 @@ function makeEvent(overrides?: Partial<InternalHookEvent>): InternalHookEvent {
     context: {},
     timestamp: new Date(),
     messages: [],
+    postHookActions: [],
     ...overrides,
   };
 }