Enable optimized codegen for Dictionary<TKey, TValue> and IDictionary<TKey, TValue> properties. The generator now analyzes key/value types and emits direct binary read loops for primitive, string, enum, and complex types with generated readers. PropInfo is extended with dictionary metadata. Improves performance and type safety by eliminating reflection and runtime type dispatch for supported dictionary types. Also refactors collection reading logic and updates dependency graph and scanning for dictionary value types.