feat(server): add project RBAC and guarded workflows

tests/unit/test_valve_isolation.py

@@ -0,0 +1,71 @@
+from collections import defaultdict
+
+from app.algorithms.isolation import valve
+
+
+def test_non_isolatable_omits_affected_node_ids_but_keeps_count(monkeypatch):
+    pipe_adj = defaultdict(
+        set,
+        {
+            "A": {"B"},
+            "B": {"A", "C"},
+            "C": {"B"},
+        },
+    )
+    topology = (
+        pipe_adj,
+        {"V-optional": ("A", "C")},
+        {"P-1": ("A", "B", "pipe")},
+        {"A", "B", "C"},
+    )
+    monkeypatch.setattr(valve, "_get_network_topology", lambda _network: topology)
+
+    result = valve.valve_isolation_analysis("demo", "P-1")
+
+    assert result["isolatable"] is False
+    assert result["affected_node_count"] == 3
+    assert result["affected_nodes"] == []
+    assert result["optional_valves"] == ["V-optional"]
+
+
+def test_isolatable_keeps_affected_node_ids_and_count(monkeypatch):
+    pipe_adj = defaultdict(set, {"A": {"B"}, "B": {"A"}})
+    topology = (
+        pipe_adj,
+        {"V-close": ("B", "C")},
+        {"P-1": ("A", "B", "pipe")},
+        {"A", "B", "C"},
+    )
+    monkeypatch.setattr(valve, "_get_network_topology", lambda _network: topology)
+
+    result = valve.valve_isolation_analysis("demo", "P-1")
+
+    assert result["isolatable"] is True
+    assert result["affected_node_count"] == 2
+    assert result["affected_nodes"] == ["A", "B"]
+    assert result["must_close_valves"] == ["V-close"]
+
+
+def test_disabled_valve_expands_affected_area_before_counting(monkeypatch):
+    pipe_adj = defaultdict(set, {"A": {"B"}, "B": {"A"}})
+    topology = (
+        pipe_adj,
+        {
+            "V-disabled": ("B", "C"),
+            "V-close": ("C", "D"),
+        },
+        {"P-1": ("A", "B", "pipe")},
+        {"A", "B", "C", "D"},
+    )
+    monkeypatch.setattr(valve, "_get_network_topology", lambda _network: topology)
+
+    result = valve.valve_isolation_analysis(
+        "demo",
+        "P-1",
+        disabled_valves=["V-disabled"],
+    )
+
+    assert result["isolatable"] is True
+    assert result["affected_node_count"] == 3
+    assert result["affected_nodes"] == ["A", "B", "C"]
+    assert result["must_close_valves"] == ["V-close"]