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.

tests/unit/test_operational_recovery.py

@@ -22,6 +22,25 @@ def observations():
     return rows
 
 
+def test_pollution_field_feedback_resumes_review_without_pressure_recovery():
+    task = {"workflow": "water_pollution"}
+    for order_id in ("sampling", "flush"):
+        assert track_work_order(task, {"kind": "create_work_order", "action_id": str(uuid4()),
+            "execution_status": "succeeded", "receipt": {"adapter": "peripheral_sample", "receipt_id": order_id}})
+    feedback = {"source_event_id": "peripheral_sample:sampling", "status": "completed", "source_revision": 2,
+        "occurred_at": RETURNED.isoformat(), "evidence": {"evidence_id": "sampling:2"}}
+    accept_completion(task, feedback)
+    assert task["handling_context"]["phase"] == "waiting_work_order"
+    accept_completion(task, {**feedback, "source_event_id": "peripheral_sample:flush", "evidence": {"evidence_id": "flush:2"}})
+    assert task["handling_context"]["phase"] == "field_review"
+    assert "verification_evidence_id" not in task["handling_context"]
+    assert task["handling_context"]["work_orders"]["sampling"]["feedback_evidence_id"] == "sampling:2"
+    task["handling_context"]["phase"] = "completed"
+    accept_completion(task, {**feedback, "source_revision": 3, "evidence": {"evidence_id": "sampling:3"}})
+    assert task["handling_context"]["phase"] == "field_review"
+    assert task["handling_context"]["work_orders"]["sampling"]["feedback_evidence_id"] == "sampling:3"
+
+
 def evaluate(rows):
     return evaluate_recovery(rows, device_ids=["P1", "F1"], returned_at=RETURNED,
                              incident_at=INCIDENT, interval_seconds=900)