CB-307: primary-gate cleanup of push-loop (drop dead clock, IDE 0/0)

Primary verification pass over the delegated push-loop delivery:
- Remove the unused LongSupplier clock threaded into ReplyPushLoop
  (timing is the scheduler's; the field was never read) from the
  component, Bridged wiring, and both test call sites.
- Collapse the single-statement WAIT_BUSY switch arm (redundant block).
- Drop now-dead test scaffolding: the always-"idle" recordingClient
  param and unused AgentStatus/AtomicReference imports.

IDE diagnostics 0/0 on all changed files; mvn clean install green
(242 tests, 0 failures).

bridged/src/test/java/dev/ltms/bridged/msg/ReplyPushLoopTest.java

@@ -3,7 +3,6 @@ package dev.ltms.bridged.msg;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import dev.ltms.bridged.herdr.AgentControl;
-import dev.ltms.bridged.herdr.AgentStatus;
 import dev.ltms.bridged.herdr.HerdrClient;
 import dev.ltms.bridged.mcp.PrimaryRegistry;
 import org.junit.jupiter.api.AfterEach;
@@ -18,8 +17,6 @@ import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.Executors;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;
-import java.util.concurrent.atomic.AtomicReference;
-import java.util.function.LongSupplier;
 
 import static org.junit.jupiter.api.Assertions.*;
 
@@ -40,14 +37,12 @@ class ReplyPushLoopTest {
     private PrimaryRegistry registry;
     private AgentControl agents;
     private InMemoryReplyInbox inbox;
-    private LongSupplier clock;
     private ScheduledExecutorService scheduler;
 
     @BeforeEach
     void setUp() {
         registry = new PrimaryRegistry(PRIMARY);
         inbox = new InMemoryReplyInbox();
-        clock = System::nanoTime;
         scheduler = Executors.newSingleThreadScheduledExecutor();
     }
 
@@ -62,7 +57,7 @@ class ReplyPushLoopTest {
     void decideWithoutPrimaryIsStop() {
         agents = agentWithStatus("idle");
         var loop = new ReplyPushLoop(
-                new PrimaryRegistry(null), agents, inbox, clock, scheduler, 5, 100);
+                new PrimaryRegistry(null), agents, inbox, scheduler, 5, 100);
         assertEquals(ReplyPushLoop.Action.STOP, loop.decide(WORKER, 0));
     }
 
@@ -129,7 +124,7 @@ class ReplyPushLoopTest {
 
     @Test
     void injectablePrimaryCausesExactlyOneNudge() throws Exception {
-        var rec = recordingClient("idle");
+        var rec = recordingClient();
         agents = new AgentControl(rec);
         inbox.publish(WORKER, "m1", "hello");
 
@@ -147,7 +142,7 @@ class ReplyPushLoopTest {
 
     @Test
     void onReplyQueuedIsIdempotentPerTarget() throws Exception {
-        var rec = recordingClient("idle");
+        var rec = recordingClient();
         agents = new AgentControl(rec);
         inbox.publish(WORKER, "m1", "hello");
 
@@ -165,7 +160,7 @@ class ReplyPushLoopTest {
     @Test
     void sendsUpToCapThenStops() throws Exception {
         int cap = 2;
-        var rec = recordingClient("idle");
+        var rec = recordingClient();
         agents = new AgentControl(rec);
         inbox.publish(WORKER, "m1", "hello");
         rec.sendLatch = new CountDownLatch(cap * 2);
@@ -195,7 +190,7 @@ class ReplyPushLoopTest {
     }
 
     private ReplyPushLoop loop(int maxReminders, long backoffMs) {
-        return new ReplyPushLoop(registry, agents, inbox, clock, scheduler, maxReminders, backoffMs);
+        return new ReplyPushLoop(registry, agents, inbox, scheduler, maxReminders, backoffMs);
     }
 
     private static AgentControl agentWithStatus(String status) {
@@ -231,22 +226,17 @@ class ReplyPushLoopTest {
      * so the scheduler thread and test thread never race.
      */
     private static final class RecordingHerdrClient implements HerdrClient {
-        private final String agentStatus;
         private final List<Map.Entry<String, Object>> calls =
                 Collections.synchronizedList(new ArrayList<>());
         volatile CountDownLatch sendLatch = new CountDownLatch(2);
 
-        RecordingHerdrClient(String agentStatus) {
-            this.agentStatus = agentStatus;
-        }
-
         @Override
         public JsonNode call(String method, Object params) {
             if ("agent.get".equals(method)) {
                 return MAPPER.createObjectNode()
                         .set("agent", MAPPER.createObjectNode()
                                 .put("terminal_id", PRIMARY)
-                                .put("agent_status", agentStatus));
+                                .put("agent_status", "idle"));   // recording double is always injectable
             }
             if ("agent.send".equals(method)) {
                 calls.add(Map.entry(method, params));
@@ -268,7 +258,7 @@ class ReplyPushLoopTest {
         }
     }
 
-    private static RecordingHerdrClient recordingClient(String status) {
-        return new RecordingHerdrClient(status);
+    private static RecordingHerdrClient recordingClient() {
+        return new RecordingHerdrClient();
     }
 }