feat: extend operational investigation workflows

resources/sql/030_operational_run_agent_ownership.sql

@@ -0,0 +1,13 @@
+-- Bind durable task runs to the Agent instance that owns their local session.
+
+BEGIN;
+
+ALTER TABLE workbench.operational_task_runs
+    ADD COLUMN IF NOT EXISTS agent_instance_id text;
+
+CREATE INDEX IF NOT EXISTS operational_task_runs_agent_owner_idx
+    ON workbench.operational_task_runs(project_id,agent_instance_id,status,created_at,run_id)
+    WHERE agent_instance_id IS NOT NULL
+      AND status IN ('claimed','running');
+
+COMMIT;