feat(scada): add calibrated monitoring and incident recovery

tests/unit/test_benchmark_normal_scada.py

@@ -0,0 +1,51 @@
+from datetime import datetime, timezone
+
+import pytest
+
+from scripts.benchmark.generation import (
+    deterministic_standard_normal,
+    noisy_scada_observation,
+)
+
+
+AT = datetime(2026, 5, 1, tzinfo=timezone.utc)
+
+
+def test_noise_is_stable_and_bound_to_observation_identity():
+    value = deterministic_standard_normal(
+        seed="normal-day-v1", at=AT, device_id="P1", metric="pressure",
+    )
+    assert value == deterministic_standard_normal(
+        seed="normal-day-v1", at=AT, device_id="P1", metric="pressure",
+    )
+    assert value != deterministic_standard_normal(
+        seed="normal-day-v1", at=AT, device_id="P2", metric="pressure",
+    )
+
+
+def test_pressure_keeps_metres_and_flow_converts_lps_to_m3h_before_noise():
+    pressure = noisy_scada_observation(
+        raw_value=20.0, device_type="pressure", at=AT, device_id="P1",
+        seed="normal-day-v1", pressure_sigma_percent=0, pressure_sigma_floor_m=0,
+    )
+    flow = noisy_scada_observation(
+        raw_value=10.0, device_type="pipe_flow", at=AT, device_id="F1",
+        seed="normal-day-v1", flow_sigma_percent=0,
+    )
+    assert pressure == 20.0
+    assert flow == 36.0
+
+
+def test_noise_is_clipped_and_pressure_never_becomes_negative():
+    value = noisy_scada_observation(
+        raw_value=0.01, device_type="pressure", at=AT, device_id="P1",
+        seed="normal-day-v1", pressure_sigma_percent=0,
+        pressure_sigma_floor_m=100, clip_sigma=3,
+    )
+    assert value >= 0
+
+    with pytest.raises(ValueError, match="unsupported"):
+        noisy_scada_observation(
+            raw_value=1, device_type="quality", at=AT, device_id="Q1",
+            seed="normal-day-v1",
+        )