fix(agents): bound telegram alert receipt readback

apps/api/tests/test_telegram_alert_monitoring_live_receipt_apply_api.py

@@ -16,6 +16,7 @@ from src.services.telegram_alert_monitoring_live_receipt_apply import (
     apply_latest_telegram_alert_monitoring_live_receipts,
     build_telegram_alert_monitoring_live_receipt_apply_readback,
     build_telegram_alert_monitoring_live_receipt_apply_receipt,
+    load_latest_telegram_alert_monitoring_live_receipt_apply_readback,
 )
 
 
@@ -352,6 +353,64 @@ async def test_telegram_monitoring_live_receipt_apply_degrades_on_db_write_press
     assert payload["operation_boundaries"]["runtime_target_write_performed"] is False
 
 
+@pytest.mark.asyncio
+async def test_telegram_monitoring_live_receipt_apply_degrades_on_coverage_pressure(
+    monkeypatch,
+):
+    async def failing_coverage(*, project_id: str):
+        assert project_id == "awoooi"
+        raise TimeoutError("coverage readback timeout")
+
+    monkeypatch.setattr(
+        apply_module,
+        "load_latest_telegram_alert_monitoring_coverage_readback",
+        failing_coverage,
+    )
+
+    payload = await apply_latest_telegram_alert_monitoring_live_receipts(
+        project_id="awoooi"
+    )
+
+    assert payload["status"] == (
+        "blocked_waiting_telegram_monitoring_live_receipt_coverage_readback"
+    )
+    assert "telegram_monitoring_live_receipt_coverage_readback_unavailable" in payload[
+        "active_blockers"
+    ]
+    assert payload["apply_result"]["db_write_status"] == "not_attempted"
+    assert payload["operation_boundaries"]["runtime_target_write_performed"] is False
+    assert payload["operation_boundaries"]["telegram_send_performed"] is False
+
+
+@pytest.mark.asyncio
+async def test_telegram_monitoring_live_receipt_apply_readback_degrades_on_coverage_pressure(
+    monkeypatch,
+):
+    async def failing_coverage(*, project_id: str):
+        assert project_id == "awoooi"
+        raise TimeoutError("coverage readback timeout")
+
+    monkeypatch.setattr(
+        apply_module,
+        "load_latest_telegram_alert_monitoring_coverage_readback",
+        failing_coverage,
+    )
+
+    payload = await load_latest_telegram_alert_monitoring_live_receipt_apply_readback(
+        project_id="awoooi"
+    )
+
+    assert payload["status"] == (
+        "blocked_waiting_telegram_monitoring_live_receipt_apply_db_readback"
+    )
+    assert "telegram_monitoring_live_receipt_apply_db_readback_unavailable" in payload[
+        "active_blockers"
+    ]
+    assert payload["rollups"]["expected_live_receipt_batch_count"] == 0
+    assert payload["operation_boundaries"]["metadata_ledger_read_performed"] is False
+    assert payload["operation_boundaries"]["telegram_send_performed"] is False
+
+
 def test_telegram_monitoring_live_receipt_apply_endpoint_returns_receipt(monkeypatch):
     async def fake_apply():
         payload = build_telegram_alert_monitoring_live_receipt_apply_receipt(