Burn lstm and Boost update

[benlee0423]

This update sync to docker commit.

1. Update docker change Burn lstm
2. Update Boost to 1.86
3. Add test for lstm image.

[Copilot]

Pull Request Overview

This PR synchronizes the Singularity build definition with the latest Docker container changes, focusing on three main updates: updating to Burn LSTM implementation, upgrading Boost from 1.79.0 to 1.86.0, and adding test coverage for LSTM functionality.

Key changes:

• Upgraded Boost library from version 1.79.0 to 1.86.0 with optimized build (headers-only)
• Added rust-lstm-1025 build and integration with automatic weight conversion
• Enhanced test suite to include LSTM-specific validation using a new test directory

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
singularity/singularity_ngen.def	Updated build process with Boost 1.86.0, refactored UV and Python environment setup, added rust-lstm build steps with weight conversion, and improved build efficiency with globstar patterns and wheel caching
.github/workflows/singularity_image.yml	Extended test coverage to include LSTM model validation by adding a second test directory and improving test robustness with better error handling

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[arpita0911patel]

Need to fix copilot suggestions on this PR.

[benlee0423]

@arpita0911patel
Fixed copilot suggestions. Feel free to review again and merge.

[benlee0423]

@JoshCu
Please review.