NK-WP-0056-T07: founder kill switch and execution findings in posture feedback

- cli: SIGTERM/SIGINT (kubectl delete job) sets the stop flag; the runner stops at the next
  step boundary and reverts. A stop before consume refuses and spends nothing.
- posture feedback v0.1 section 4a: --receipts reads bounded-executor events through the
  receipt validator: execution-receipt-missing, -not-completed, -reverted, -budget-pressure,
  and the aggregate execution-recurring-revert. Owners come from the authoritative
  tools/posture-feedback/execution-owners.yaml, never inferred.

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

Assistant: claude-code
Assistant-Model: opus
Assistant-Process: 523928@bnt-lap001
Assistant-Session: 6c737afb-9c14-4152-9f02-477214b9c350

bounded-executor/tests/test_executor.py

@@ -402,6 +402,12 @@ class FailureTests(Base):
         self.assertIn("restore-kv", self.ops())
         self.assertNotIn("deliver", self.ops())
 
+    def test_stop_before_consume_spends_nothing(self):
+        self.w.stop_after = 0
+        result = self.run_it()
+        self.assertEqual((result["outcome"], result["reason"]), ("refused", "stopped_before_consume"))
+        self.assertEqual((self.w.carrier.consumes, self.w.events, self.ops()), (0, [], []))
+
     def test_settle_time_is_waited_and_counted(self):
         self.doc = synthetic_admission(self.root, lambda s: s["checks"][3].update(settle_seconds=125))
         self.w = World(self.doc, self.clock)