test: cover stale ledger outbox lease updates

Co-authored-by: genichin <4282227+genichin@users.noreply.github.com>

tests/adapters/persistence/test_postgresql_ledger_outbox.py

@@ -169,6 +169,45 @@ def test_claim_expiry_allows_safe_recovery_after_worker_crash(pg_clean):
     assert [item.correlation_id for item in claimed_b] == [row.correlation_id]
 
 
+def test_stale_claim_cannot_overwrite_new_owner_outcome(pg_clean):
+    now = {"t": datetime(2026, 6, 4, tzinfo=UTC)}
+    outbox_a = PostgreSQLLedgerOutbox(
+        pg_clean,
+        instance_key="inst-a",
+        claim_ttl_sec=5.0,
+        worker_id="worker-a",
+        clock=lambda: now["t"],
+    )
+    outbox_b = PostgreSQLLedgerOutbox(
+        pg_clean,
+        instance_key="inst-a",
+        claim_ttl_sec=5.0,
+        worker_id="worker-b",
+        clock=lambda: now["t"],
+    )
+    row = outbox_a.enqueue(_trade(execution_id="pg-stale"))
+
+    [claim_a] = outbox_a.claim_pending()
+    now["t"] = datetime(2026, 6, 4, 0, 0, 6, tzinfo=UTC)
+    [claim_b] = outbox_b.claim_pending()
+    outbox_b.mark_outcome(
+        row.correlation_id,
+        OutboxOutcome.COMPLETED,
+        expected_claim_expires_at=claim_b.claim_expires_at,
+    )
+
+    stored = outbox_a.mark_outcome(
+        row.correlation_id,
+        OutboxOutcome.RETRYABLE_FAILURE,
+        error="stale owner",
+        next_retry_at=now["t"],
+        expected_claim_expires_at=claim_a.claim_expires_at,
+    )
+
+    assert stored.status is WorkItemStatus.COMPLETED
+    assert stored.last_outcome is OutboxOutcome.COMPLETED
+
+
 def test_writer_records_retryable_403_without_cross_instance_delivery(pg_clean):
     class _ForbiddenLedger:
         def __init__(self):

tests/application/test_ledger_outbox.py

@@ -71,9 +71,9 @@ def test_writer_retries_until_success():
 
 
 def test_process_correlation_id_only_drains_requested_row():
-    outbox = InMemoryLedgerOutbox()
+    outbox = InMemoryLedgerOutbox(instance_key="inst-a")
     ledger = InMemoryLedger()
-    writer = LedgerWriter(outbox, ledger)
+    writer = LedgerWriter(outbox, ledger, instance_key="inst-a")
     first = outbox.enqueue(_trade(execution_id="e-1"))
     second = outbox.enqueue(_trade(execution_id="e-2"))
 
@@ -81,6 +81,8 @@ def test_process_correlation_id_only_drains_requested_row():
 
     assert outcome is OutboxOutcome.COMPLETED
     assert ledger.count() == 1
+    assert writer.counters["claim:claimed"] == 1
+    assert writer.counters["outcome:completed"] == 1
     assert outbox.get(first.correlation_id).status is WorkItemStatus.COMPLETED
     assert outbox.get(second.correlation_id).status is WorkItemStatus.PENDING