Phase2 dry-run: pending A, probe, build-config client, gated task/add

Still default dry-run; ALLOW_LIVE_SUBMIT=0. Live gates closed.

tests/test_gate.py

@@ -19,6 +19,27 @@ class FakeClient:
 
 
 class TestGate(unittest.TestCase):
+    def setUp(self):
+        self.counter = mock.patch('src.gate._submit_count', 0)
+        self.counter.start()
+        self.addCleanup(self.counter.stop)
+        self.env = mock.patch.dict(os.environ, {}, clear=True)
+        self.env.start()
+        self.addCleanup(self.env.stop)
+
+    def test_queue_and_process_limit(self):
+        client = FakeClient()
+        with mock.patch.dict(os.environ, {
+            'STRATEGY_ID': 'sid', 'ALLOW_LIVE_SUBMIT': '1',
+            'LIVE_CONFIRM': LIVE_CONFIRM_VALUE, 'ASYNC_QUEUE_DEPTH': '95'
+        }):
+            self.assertIn('≥95', attempt_live_submit({}, client)['reason'])
+            self.assertEqual(client.calls, [])
+            os.environ['ASYNC_QUEUE_DEPTH'] = '94'
+            self.assertTrue(attempt_live_submit({}, client)['submitted'])
+            self.assertFalse(attempt_live_submit({}, client)['submitted'])
+            self.assertEqual(len(client.calls), 1)
+
     def _clear_gate_env(self):
         return mock.patch.dict(
             os.environ,
@@ -78,7 +99,7 @@ class TestGate(unittest.TestCase):
         self.assertEqual(d.mode, "live")
 
     def test_open_gate_without_client_still_blocked(self) -> None:
-        """Phase1: no real HTTP client even when gate is open."""
+        """Phase2: an open gate never constructs a network client."""
         with mock.patch.dict(
             os.environ,
             {