fix(telegram): pin durable provider destination proof

apps/api/tests/test_agent99_controlled_dispatch_ledger_contract.py

@@ -64,6 +64,12 @@ def test_accepted_without_inbox_trigger_is_delivery_unknown_not_authorized() ->
         "verifier": "",
         "route_id": "agent99:host_recovery:Recover",
     }
+    assert envelope["learning_writeback"]["required_receipts"] == [
+        "incident_closure_receipt_id",
+        "telegram_lifecycle_receipt_id",
+        "km_writeback_ack_id",
+        "playbook_trust_writeback_ack_id",
+    ]
 
 
 @pytest.mark.asyncio