Type-Flow Diagram — `_TypeFlow` (v1.51.0)

Every [ResultFlow] method now generates a second Mermaid constant: {MethodName}_TypeFlow. It has the same nodes as the main diagram but labels every success edge with the Result<T> type flowing through it, making the static type journey visible at a glance.

// _Diagram — structural view (default)
Console.WriteLine(Pipelines_Flows.PlaceOrder);
// → N0 -->|ok| N1 -->|ok| SUCCESS

// _TypeFlow — type travel view
Console.WriteLine(Pipelines_Flows.PlaceOrder_TypeFlow);
// → N0 -->|Result<User>| N1 -->|Result<Order>| SUCCESS

Useful for type-level documentation, design reviews, and IDE hover previews. The VSIX sidebar Types button swaps between _Diagram and _TypeFlow for any open pipeline panel; the button is disabled when _TypeFlow is absent.

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