CB-110: cover drop of a delivered-but-unpicked-up turn

Adds the drop test for the delivered/awaitingPickup/!turnObserved state (worker
vanished after delivery but before a WORKING sample) — a gap the other two drop
tests missed. Surfaced by an off-sub worker's code review of CB-110, delegated
through the bridge itself.

bridged/src/test/java/dev/ltms/bridged/inject/InjectorTest.java

@@ -253,6 +253,20 @@ class InjectorTest {
         assertEquals(List.of(T), cap.failed, "a worker that vanishes mid-turn fails its in-flight send");
     }
 
+    @Test
+    void dropFailsADeliveredTurnThatVanishesBeforePickupIsConfirmed() {
+        // Delivered but no WORKING sampled yet (awaitingCompletion=true, awaitingPickup still true,
+        // turnObserved=false) — a distinct state the other two drop tests don't cover. (Gap surfaced
+        // by an off-sub worker's review of CB-110, delegated through the bridge.)
+        Captor cap = new Captor();
+        Injector inj = new Injector(new AgentControl(herdr), cap);
+        inj.enqueue(T, "task");
+        inj.onStatus(T, AgentStatus.IDLE); // deliver; pickup never confirmed
+
+        inj.drop(T, new HerdrException("worker gone", "pane_not_found", null));
+        assertEquals(List.of(T), cap.failed, "a delivery that vanishes before pickup still fails its send");
+    }
+
     @Test
     void pollerDeliversToAnIdleWorker() throws Exception {
         // End-to-end through the poller: idle worker → message delivered without manual onStatus.