fix(kvb-org-queue): an unclaimed grant drops its reservation

evaluate counted every unblocked waiting entry as granted for the entries behind it, but only that entry's own wait() poll turns it active; a living holder that stopped polling kept its slot and share forever and wedged the queue. Every poll now stamps polled; a waiting entry silent for CLAIM_SECONDS (3 polls) reserves nothing and is listed last, and once it polls again it takes a fresh seq and enqueue time, so it rejoins at the back of its rank.

🎯 Fix: 92 %
💥 Break: 3 %
💸 Cost: 100 %
⏱️ Time: 100 %
🛡️ Security: 100 %
🏆 Score: 89
🚦 Gate: ✅ 90/5, cost and time <= 100, security 100 %

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_queue.py

@@ -208,6 +208,22 @@ class TestEvaluate(unittest.TestCase):
         verdicts = self.decide([job(1, task="work/b", kind="deploy"), job(2, kind="deploy")])
         self.assertEqual(verdicts, {"j2": None, "j1": "all 1 deploy slots taken"})
 
+    def test_a_waiter_that_stopped_polling_reserves_nothing_and_the_next_one_is_granted(self):
+        behind = job(3, task="work/b", kind="deploy", polled=NOW)
+        verdicts = self.decide([job(2, kind="deploy", polled=NOW - 61), behind])
+        self.assertEqual(verdicts, {"j3": None, "j2": "no poll for 61 s; reserves nothing until it polls again"})
+        for polling in (job(2, kind="deploy", polled=NOW - 59), job(2, kind="deploy")):
+            self.assertEqual(self.decide([polling, behind]), {"j2": None, "j3": "all 1 deploy slots taken"})
+
+    def test_a_silent_waiter_rejoins_at_the_back_once_it_polls_again(self):
+        data = {"seq": 7, "entries": []}
+        silent = job(2, polled=NOW - 61, enqueued=NOW - 2 * HOUR)
+        self.queue.rejoin(data, silent, NOW)
+        self.assertEqual((silent["seq"], silent["enqueued"], silent["polled"], data["seq"]), (8, NOW, NOW, 8))
+        polling = job(3, polled=NOW - 30, enqueued=NOW - HOUR)
+        self.queue.rejoin(data, polling, NOW)
+        self.assertEqual((polling["seq"], polling["enqueued"], polling["polled"], data["seq"]), (3, NOW - HOUR, NOW, 8))
+
     def test_disk_reservation_keeps_smaller_jobs_from_starving_a_big_one(self):
         big, small = job(1, need_gb=50), job(2, task="work/b", need_gb=5)
         verdicts = self.decide([big, small], free_gb=40.0)