fix(reboot): preserve edge maintenance blocker in api overlay

apps/api/tests/test_reboot_auto_recovery_slo_scorecard_api.py

@@ -229,6 +229,43 @@ def test_reboot_auto_recovery_slo_scorecard_does_not_reopen_ready_public_mainten
     ] == 1
 
 
+def test_reboot_auto_recovery_slo_scorecard_preserves_edge_metric_blocker_until_edge_readback_ready(
+    tmp_path,
+):
+    runtime_path = tmp_path / "public-maintenance-fallback.json"
+    runtime_path.write_text(
+        json.dumps(PUBLIC_MAINTENANCE_RUNTIME_READY),
+        encoding="utf-8",
+    )
+    metric_readback = dict(PROMETHEUS_RUNTIME_READBACK)
+    metric_readback["active_blockers"] = [
+        *PROMETHEUS_RUNTIME_BLOCKERS,
+        "public_route_raw_5xx_without_maintenance_fallback",
+        "edge_public_maintenance_live_config_drift",
+    ]
+    metric_readback["active_blocker_count"] = len(metric_readback["active_blockers"])
+
+    payload = load_latest_reboot_auto_recovery_slo_scorecard(
+        public_maintenance_runtime_path=runtime_path,
+        prometheus_metric_readback=metric_readback,
+    )
+
+    assert "public_route_raw_5xx_without_maintenance_fallback" not in payload[
+        "active_blockers"
+    ]
+    assert "edge_public_maintenance_live_config_drift" in payload["active_blockers"]
+    assert (
+        payload["public_maintenance_fallback"][
+            "edge_fallback_runtime_readback_present"
+        ]
+        is False
+    )
+    assert payload["readback"][
+        "runtime_metric_runtime_readback_reconciled_blockers"
+    ] == ["public_route_raw_5xx_without_maintenance_fallback"]
+    assert payload["active_blocker_count"] == 9
+
+
 def test_reboot_auto_recovery_slo_scorecard_overlays_edge_fallback_live_drift(
     tmp_path,
 ):