feat(workbench): persist operational workflows and events

tests/unit/test_workbench_events.py

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+from contextlib import asynccontextmanager
+from types import SimpleNamespace
+from uuid import uuid4
+
+import pytest
+from fastapi import HTTPException
+
+from app.api.v1.endpoints import workbench_events as endpoint
+from app.auth.project_dependencies import ProjectContext
+from app.infra.db.project_routing import ActiveProjectRouting
+
+
+@pytest.fixture
+def anyio_backend():
+    return "asyncio"
+
+
+class FakeHub:
+    generation = 0
+
+    async def oldest_cursor(self):
+        return 5
+
+    async def current_cursor(self):
+        return 8
+
+
+class FakeHubManager:
+    @asynccontextmanager
+    async def subscribe(self, _project_id, _dsn):
+        yield FakeHub()
+
+
+class FakeMetadataRepository:
+    def __init__(self, routings):
+        self.routings = routings
+        self.session = SimpleNamespace(closed=False, close=self.close)
+
+    async def close(self):
+        self.session.closed = True
+
+    async def list_active_project_db_routings(self, _role):
+        return self.routings
+
+
+@pytest.mark.anyio
+async def test_expired_event_cursor_requires_snapshot_reset(monkeypatch):
+    project_id = uuid4()
+    dsn = "postgresql://test@db.example:5432/project_a"
+    routing = ActiveProjectRouting("project-a", dsn, project_id=project_id)
+    metadata = FakeMetadataRepository([
+        SimpleNamespace(project_id=project_id, dsn=dsn)
+    ])
+    monkeypatch.setattr(endpoint, "workbench_event_hubs", FakeHubManager())
+
+    response = await endpoint.workbench_events(
+        after=1,
+        last_event_id=None,
+        ctx=ProjectContext(
+            project_id=project_id, project_code="project-a", user_id=uuid4(),
+            project_role="member",
+        ),
+        routing=routing,
+        metadata_repo=metadata,
+    )
+    first = await anext(response.body_iterator)
+
+    assert metadata.session.closed is True
+    assert "event: reset_required" in first
+    assert '"cursor":1' in first
+
+
+@pytest.mark.anyio
+async def test_shared_business_database_disables_event_stream():
+    project_id = uuid4()
+    dsn = "postgresql://user:secret@db.example:5432/shared"
+    metadata = FakeMetadataRepository([
+        SimpleNamespace(project_id=project_id, dsn=dsn),
+        SimpleNamespace(project_id=uuid4(), dsn="postgresql://other:other@db.example/shared"),
+    ])
+
+    with pytest.raises(HTTPException) as exc:
+        await endpoint.workbench_events(
+            after=0,
+            last_event_id=None,
+            ctx=ProjectContext(
+                project_id=project_id, project_code="project-a", user_id=uuid4(),
+                project_role="member",
+            ),
+            routing=ActiveProjectRouting("project-a", dsn, project_id=project_id),
+            metadata_repo=metadata,
+        )
+
+    assert exc.value.status_code == 503