feat(benchmark_di): add resolve phases, eager/lazy scenarios, and adapter parity

benchmark_di/lib/scenarios/universal_binding_mode.dart

@@ -1,9 +1,12 @@
 /// Enum to represent the DI registration/binding mode.
 enum UniversalBindingMode {
-  /// Singleton/provider binding.
+  /// Eager singleton — instance created at registration time.
   singletonStrategy,
 
-  /// Factory-based binding.
+  /// Lazy singleton — instance created on first resolve, then cached.
+  lazySingletonStrategy,
+
+  /// Factory-based binding — new instance every time.
   factoryStrategy,
 
   /// Async-based binding.