Python: Add snippet tag for Python memory tutorial sample

[eavanvalkenburg]

Summary

• add a run_with_memory snippet region to python/samples/01-get-started/04_memory.py
• enable docs to reference the runnable memory flow via :::code id=run_with_memory

Validation

• docs/snippet migration only; no runtime behavior changes

[Copilot]

Pull request overview

This PR adds snippet tags to enable documentation to reference a specific code section from the Python memory tutorial sample. The snippet markers follow the established pattern used throughout the getting-started samples.

Changes:

• Add # <run_with_memory> and # </run_with_memory> tags around the memory demonstration code in the main function