fix: preserve typed plan transports and index installed metadata

Preserve YAML enum tags before decoding, while keeping JSON numeric binding keys valid. Build a temporary decoded DAG/family lookup for each validation or installation pass and reuse installed family maps during revision recovery. Derive non-TopK item labels from the same Planner update as runtime. Refresh ownership and v2 deployment-only materialization documentation.

Validation: YAML regression fails on the original JSON buffer; 99 shared-type tests pass after the fix. Nonempty JSON/YAML DAG roundtrip and keyed-label regressions pass. Independent review by mixed_placement agent.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: zzylol

control_plane/src/physical/compiler.rs

@@ -4758,22 +4758,21 @@ fn collect_selected_materializations_with(
                 }
                 if let Some(readout) = readout {
                     let mut parameters = sketch_params_json(kind.params());
-                    let mut item_label = None;
+                    use planner_types::post_asap::SummaryInputExpr;
+                    let item_label = match &input.item {
+                        Some(SummaryInputExpr::Column(
+                            planner_types::pre_asap::ColumnRef::Named(label),
+                        )) => Some(label.clone()),
+                        Some(SummaryInputExpr::Column(
+                            planner_types::pre_asap::ColumnRef::Qualified { name, .. },
+                        )) => Some(name.clone()),
+                        // Legacy/direct TopK plans did not carry an item
+                        // projection. Keep their generic item-key behavior;
+                        // typed Planner plans name the inner aggregate
+                        // identity explicitly through SummaryUpdate.item.
+                        _ => None,
+                    };
                     if matches!(readout, SketchQuery::TopK { .. }) {
-                        use planner_types::post_asap::SummaryInputExpr;
-                        item_label = match &input.item {
-                            Some(SummaryInputExpr::Column(
-                                planner_types::pre_asap::ColumnRef::Named(label),
-                            )) => Some(label.clone()),
-                            Some(SummaryInputExpr::Column(
-                                planner_types::pre_asap::ColumnRef::Qualified { name, .. },
-                            )) => Some(name.clone()),
-                            // Legacy/direct TopK plans did not carry an item
-                            // projection. Keep their generic item-key behavior;
-                            // typed Planner plans name the inner aggregate
-                            // identity explicitly through SummaryUpdate.item.
-                            _ => None,
-                        };
                         let mode = match &input.weight {
                             SummaryInputExpr::Constant(value) if *value == 1.0 => "count",
                             SummaryInputExpr::Column(
@@ -9174,6 +9173,44 @@ pub(crate) mod tests {
         }
     }
 
+    // Both plan transports retain nonempty typed DAGs and numeric binding keys.
+    #[test]
+    fn installed_dag_plan_round_trips_in_json_and_yaml() {
+        let plan = DeploymentPlanCompiler
+            .compile_promql(
+                request("roundtrip", "sum_over_time(m[1m])"),
+                environment(10_000),
+            )
+            .unwrap()
+            .precompute_plan;
+        assert!(!plan.executable_dags.is_empty());
+        let json = serde_json::to_value(&plan).unwrap();
+        let from_json: PrecomputePlan = serde_json::from_value(json.clone()).unwrap();
+        let from_yaml: PrecomputePlan =
+            serde_yaml::from_str(&serde_yaml::to_string(&plan).unwrap()).unwrap();
+        assert_eq!(serde_json::to_value(from_json).unwrap(), json);
+        assert_eq!(serde_json::to_value(from_yaml).unwrap(), json);
+    }
+
+    // Non-TopK keyed sketches retain the same item dimension as their Planner update.
+    #[test]
+    fn keyed_non_topk_materialization_preserves_item_label() {
+        let request = request("keyed", "quantile_over_time(0.90, m[1m])");
+        let mut root = request.queries[0].selected_plan_root.as_ref().clone();
+        let SummaryExpr::SummaryEstimate { summary_input, .. } = &mut root.expr else {
+            panic!("expected estimate");
+        };
+        let SummaryExpr::SummaryAgg { input, .. } = &mut Rc::make_mut(summary_input).expr else {
+            panic!("expected summary state");
+        };
+        input.item = Some(planner_types::post_asap::SummaryInputExpr::Column(
+            planner_types::pre_asap::ColumnRef::Named("customer".into()),
+        ));
+        let root = Rc::new(root);
+        let selected = collect_selected_materializations(&root, false).unwrap();
+        assert_eq!(selected[0].item_label.as_deref(), Some("customer"));
+    }
+
     #[test]
     fn multiple_readouts_share_one_precompute_materialization() {
         let mut compilation_request = request("q-p90", "quantile_over_time(0.90, m[1m])");