robustify the code and add hello world style for "... python -m dlp_mpi"

[boeddeker]

No description provided.

[Copilot]

Pull request overview

This pull request robustifies the MPI backend initialization code and adds a "hello world" style entry point for running python -m dlp_mpi. The changes improve the SLURM port selection fallback logic to handle cases where SLURM_STEP_RESV_PORTS is not available, refactor the initialization detection code for better maintainability, and add a diagnostic tool for debugging MPI setup issues.

Changes:

• Added fallback port selection strategies for SLURM environments when SLURM_STEP_RESV_PORTS is unavailable
• Refactored initialization logic in get_init.py to use a more flexible type detection system with better error handling
• Created __main__.py entry point to display MPI backend information and demonstrate basic MPI functionality

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 8 comments.

File	Description
dlp_mpi/util.py	Updated MPI import to use the wrapper module instead of importing mpi4py directly
dlp_mpi/ame/core/_init/slurm.py	Added multi-tier fallback logic for port selection and fixed authkey encoding
dlp_mpi/ame/core/_init/get_init.py	Refactored initialization code with new _get() and print_info() functions for better diagnostics
dlp_mpi/main.py	New entry point for displaying MPI configuration and testing basic functionality

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