feat(investigations): add event impact and work-order feedback flows

Add isolated burst and pollution impact evidence, parallel work-order workflows, persisted notifications and graph updates.

Checkpoint current code. Known follow-ups remain for large pollution result previews and graceful geometry failure.

app/services/scada_replay.py

@@ -429,6 +429,7 @@ class ScadaReplayService:
             await self.repo.save(document)
 
     async def _create_investigations(self, document, changes, batch, *, create_tasks=True):
+        from app.services.scada_normal_profile import pollution_signal
         from app.domain.schemas.operational_task import OperationalTaskCreate, TaskSource, TaskTrigger
         from app.infra.db.postgresql.operational_tasks import OperationalTaskRepository
         from app.services.operational_tasks import OperationalTaskService
@@ -443,9 +444,10 @@ class ScadaReplayService:
                                        self.context, permissions_for_context(self.context),
                                        execution_scope=settings.operational_task_execution_scope)
         for event in changes:
-            # Period diagnosis owns measurement notifications during manual steps.
-            # Retain rule events as evidence; quality alerts remain independent.
-            if (not create_tasks and event.get("category") != "data_quality"
+            pollution = pollution_signal(document, event)
+            # Pressure/flow rules share period diagnosis during manual steps.
+            # Water-quality incidents and telemetry-quality alerts stay independent.
+            if (not create_tasks and not pollution and event.get("category") != "data_quality"
                     and (event["change"] == "raised" or event.get("notification_suppressed"))):
                 if event["change"] == "raised":
                     event["batch_sequence"] = batch["sequence"]
@@ -457,13 +459,33 @@ class ScadaReplayService:
             if event["change"] == "raised":
                 event["batch_sequence"] = batch["sequence"]
                 document["rule_states"][event.get("state_key", event["rule_id"])]["event"]["batch_sequence"] = batch["sequence"]
+            if event["change"] == "raised" and event.get("category") != "data_quality" and (create_tasks or pollution):
+                external = f"scada_replay:{document['replay_id']}:event:{event['event_id']}"
+                command = OperationalTaskCreate(
+                    request_id=uuid5(NAMESPACE_URL, external), task_type="event_investigation",
+                    workflow="water_pollution" if pollution else "scada_anomaly",
+                    title=f"{'水污染事件调查' if pollution else 'SCADA 回放调查'} · {event['rule_id']}",
+                    summary=event["detail"], source=TaskSource(
+                        kind="external_system", external_id=external, external_revision=1,
+                        event_kind="water_pollution" if pollution else "scada_anomaly",
+                        replay_context={"replay_id": document["replay_id"],
+                                        "knowledge_cutoff": batch["at"], "batch_sequence": batch["sequence"]},
+                    ),
+                    trigger=TaskTrigger(kind="event", occurred_at=event["occurred_at"], detail=(
+                        "水质监测规则检出异常，启动水污染事件调查；污染源及影响待核验" if pollution else
+                        "已存 SCADA 历史的回放检测信号，原因尚待调查")),
+                )
+                task = await tasks.create(command)
+                event["task_id"] = str(task.task_id)
+                document["rule_states"][event.get("state_key", event["rule_id"])]["event"]["task_id"] = event["task_id"]
             await alerts.push(TaskAlertEvent(
                 event_id=uuid5(NAMESPACE_URL, event["event_id"] + ":" + event["change"]),
                 alert_id=event["event_id"], producer_id=producer, event_type=event["change"],
-                occurred_at=event["occurred_at"], condition_id=None,
+                occurred_at=event["occurred_at"],
+                condition_id=f"operational-task:{event['task_id']}" if pollution and event.get("task_id") else None,
                 source={"kind": "scada_replay", "replay_id": document["replay_id"],
                         "rule_id": event["rule_id"], "batch_sequence": event["batch_sequence"]},
-                title=f"SCADA 回放异常 · {event['rule_id']}", description=event["detail"], severity="warning",
+                title=f"{'水污染侦测异常' if pollution else 'SCADA 回放异常'} · {event['rule_id']}", description=event["detail"], severity="warning",
             ))
             if event["change"] != "raised":
                 if event.get("task_id"):
@@ -472,25 +494,6 @@ class ScadaReplayService:
                         "batch_sequence": batch["sequence"],
                     }, uuid5(NAMESPACE_URL, event["event_id"] + ":recovery"))
                 continue
-            if event.get("category") == "data_quality":
-                continue
-            if not create_tasks:
-                continue
-            external = f"scada_replay:{document['replay_id']}:event:{event['event_id']}"
-            command = OperationalTaskCreate(
-                request_id=uuid5(NAMESPACE_URL, external), task_type="event_investigation",
-                workflow="scada_anomaly", title=f"SCADA 回放调查 · {event['rule_id']}",
-                summary=event["detail"], source=TaskSource(
-                    kind="external_system", external_id=external, external_revision=1,
-                    event_kind="scada_anomaly",
-                    replay_context={"replay_id": document["replay_id"],
-                                    "knowledge_cutoff": batch["at"], "batch_sequence": batch["sequence"]},
-                ),
-                trigger=TaskTrigger(kind="event", occurred_at=event["occurred_at"], detail="已存 SCADA 历史的回放检测信号，原因尚待调查"),
-            )
-            task = await tasks.create(command)
-            event["task_id"] = str(task.task_id)
-            document["rule_states"][event.get("state_key", event["rule_id"])]["event"]["task_id"] = event["task_id"]
 
     async def _create_monitoring_task(self, document, monitoring, batch):
         from app.services.scada_monitoring_incidents import attach_incident, update_incident