build
Builds and returns an instance of AIAgentSubgraphBase configured with the specified input and output types.
The method initializes a graph strategy with a name, input class, and output class. It leverages the provided buildSubgraph to define the logic for the subgraph creation. The resulting graph is finalized and returned as an AIAgentSubgraphBase instance.
Return
A configured instance of AIAgentSubgraphBase with the specified input and output types.