feat: add ledger backfill command

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

tests/application/test_ledger_outbox.py

@@ -68,3 +68,18 @@ def test_writer_retries_until_success():
     now["t"] += timedelta(seconds=600)       # past the backoff window
     s2 = writer.run_once()
     assert s2.completed == 1 and ledger.count() == 1
+
+
+def test_process_correlation_id_only_drains_requested_row():
+    outbox = InMemoryLedgerOutbox()
+    ledger = InMemoryLedger()
+    writer = LedgerWriter(outbox, ledger)
+    first = outbox.enqueue(_trade(execution_id="e-1"))
+    second = outbox.enqueue(_trade(execution_id="e-2"))
+
+    outcome = writer.process_correlation_id(first.correlation_id)
+
+    assert outcome is OutboxOutcome.COMPLETED
+    assert ledger.count() == 1
+    assert outbox.get(first.correlation_id).status is WorkItemStatus.COMPLETED
+    assert outbox.get(second.correlation_id).status is WorkItemStatus.PENDING