more refactoring

Signed-off-by: Ryan Zhang <[email protected]>

Author: Ryan Zhang

.github/.copilot/breadcrumbs/2025-07-17-1200-clusterresourceplacement-controller-interface-refactor.md

@@ -84,10 +84,22 @@ This follows the breadcrumb protocol and builds on previous successful interface
 - ✅ No type assertion issues in main business logic
 - ✅ Error handling preserved and working correctly
 
-### Current Compilation Status ✅
-- controller.go: ✅ No errors
-- placement_status.go: ✅ No errors  
-- resource_selector.go: ✅ No errors (already updated in Phase 2)
+### Phase 5: Refactor placement_status.go Functions ⚠️
+- [ ] Task 5.1: Update `appendFailedToScheduleResourcePlacementStatuses()` to use PlacementObj interface
+- [ ] Task 5.2: Update `appendScheduledResourcePlacementStatuses()` to use PlacementObj and interface types
+- [ ] Task 5.3: Update `buildClusterResourceBindings()` to use PlacementObj and return BindingObj interfaces
+- [ ] Task 5.4: Update `findClusterResourceSnapshotIndexForBindings()` to use interface types
+- [ ] Task 5.5: Update `setResourcePlacementStatusPerCluster()` to use interface types
+- [ ] Task 5.6: Update `setResourcePlacementStatusBasedOnBinding()` to use interface types
+
+### Functions to Refactor in placement_status.go 🎯
+**Current concrete type usage identified:**
+- `appendFailedToScheduleResourcePlacementStatuses()` - Takes `*ClusterResourcePlacement`
+- `appendScheduledResourcePlacementStatuses()` - Takes `*ClusterResourcePlacement`, `*ClusterSchedulingPolicySnapshot`, `*ClusterResourceSnapshot`
+- `buildClusterResourceBindings()` - Takes `*ClusterResourcePlacement`, `*ClusterSchedulingPolicySnapshot`, returns `map[string]*ClusterResourceBinding`
+- `findClusterResourceSnapshotIndexForBindings()` - Takes `*ClusterResourcePlacement`, `map[string]*ClusterResourceBinding`
+- `setResourcePlacementStatusPerCluster()` - Takes `*ClusterResourcePlacement`, `*ClusterResourceSnapshot`, `*ClusterResourceBinding`
+- `setResourcePlacementStatusBasedOnBinding()` - Takes `*ClusterResourcePlacement`, `*ClusterResourceBinding`
 
 ### Phase 3: Snapshot Management Function Updates
 - [ ] Task 3.1: Update `getOrCreateClusterSchedulingPolicySnapshot` to return PolicySnapshotObj