Merge main into refactor/instance-split

Resolved conflicts in:
- pkg/instance/instance.go: Combined remote detection logic from main with refactored structure
- pkg/manager/manager_test.go: Updated manager initialization to include localNodeName parameter
- pkg/manager/remote_ops.go: Removed stripNodesFromOptions function that was deleted in main
- pkg/manager/remote_ops_test.go: Removed file that was deleted in main

🤖 Generated with [Claude Code](https://claude.ai/code)

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

pkg/manager/operations_test.go

@@ -75,7 +75,7 @@ func TestCreateInstance_ValidationAndLimits(t *testing.T) {
 		MaxInstances:         1, // Very low limit for testing
 		TimeoutCheckInterval: 5,
 	}
-	limitedManager := manager.NewInstanceManager(backendConfig, cfg, map[string]config.NodeConfig{})
+	limitedManager := manager.NewInstanceManager(backendConfig, cfg, map[string]config.NodeConfig{}, "main")
 
 	_, err = limitedManager.CreateInstance("instance1", options)
 	if err != nil {