[New Sample] Add "PIGU_Hybrid" Model Computational Graph

[inaniloquentee]

Model: PIGU_Hybrid (Custom CFD Reconstruction Model)
Framework: PyTorch
Dependency: torch, numpy
Content:
Added the computation graph for a custom fluid dynamics model named PIGU_Hybrid. This model utilizes Spatially Modulated Hybrid Attention for flow reconstruction tasks.

Verification:

• Validated locally using graph_net.torch.validate with Success result.

Note:

• During graph extraction, the target grid resolution was explicitly fixed to 128x256. This was necessary to resolve TorchDynamo symbolic tracing errors related to dynamic shape inference in interpolate and cat operations.

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